"This Facebook™ interest software enabled me to build a cold-traffic machine that banks $7.06 for every $1"

  • Interest search tool reveals 1000’s of targetable Facebook interests your competition can’t find, so you can avoid the bidding war, be hyper-relevant and increase your return-on-ad-spend.
  • Interest highlighter tool saves you hours of manual copy-pasting by showing you exactly which pages in FB Audience Insights have an associated interest that can be targeted with ads.

Hi there, I'm Paco Vermeulen, the founder and CEO of InterestExplorer.

Our powerful suite of tools is used by thousands of Facebook marketers from 75+ countries.

I run Facebook ads every single day, with a great return (to me that's literally the only metric that counts) ????

But it wasn't always like that...

Let me share a background story.

I'm the entrepreneurial type. I always have a lot of ideas and see new opportunities all around me. Over time I've started a fair number of websites - selling anything from custom printed t-shirts to various ClickBank products to my own online piano courses.

I made sales.

But never very consistently.

Because I relied on organic traffic sources like Google and YouTube. Of course free traffic is great, but you can't control it.

And control was important to me.

Because back then I wanted to be able to make one of my side gigs my main gig.

I wanted to be able to support our family and pay the rent - just from the (passive) income generated by my side-projects.

So I started experimenting with paid ads - to have more control and drive up revenue.

That quickly turned into an obsession.

I chased every new strategy and tactic that I found on blogs and in FB groups. 

But I always ended up looking at the bottom of the "Amount spent" column in FB Ads Manager, knowing I spent more than I made in return.

That's not an effective strategy...

Because of the increasing competition on Facebook, my ad costs increased too.

Most of the campaigns I tested were too expensive - and sooner or later I was forced to turn them off. I had to find a solution first - instead of throwing more money in a leaking bucket.

I started looking.

And at some point, I can't remember where, I read about the existence of the Facebook Marketing API. At first I didn't know what that was.

But as I was desperately looking for the next tactic I could test - I ended up reading...

FB's documentation for developers.

I never ever read manuals - but I'm glad I read this one.

I discovered that there are many more interests you can target on Facebook, than just the ones that are suggested in the Facebook Ads Manager. Literally tens of thousands. Hidden in the FB Marketing API - so unknown to 99% of my competitors. I also learned HOW you should actually use interest targeting on Facebook - something that almost no-one talks about online. And finally I discovered that interests aren't the only objects that Facebook hides...

That's when I realised that the key to Facebook advertising success is to fish where (almost) no-one else is fishing.

By targeting hidden Facebook interests, that (almost) no-one else knows how to find.

Copy, visuals, sales funnels. Sure, that's all important. But meaningless if the targeting is off and you don't reach the right people.

So I fixed my targeting first.

And that paid off. Big time.

The very first test I did using hidden interests was already succesfull. My small experiment outperformed every other campaign I ran before.

In the screenshot below, you'll see ????

I got a 319% ROAS on a cold-traffic campaign ????

Then I optimised my campaign further and I built a cold-traffic acquisition machine.

The screenshot below shows one of my active cold-traffic campaigns. It contains a bunch of ad sets. All targeting the US market. I'm just using interests to target and some basic demographics like age and gender. I exclude all my website visitors in this campaign - so it's 100% cold traffic.

The results speak for itself I think ☝️ 

The average ROAS is 7.06, meaning the campaign banks $7.06 for every $1 I put in.

To be honest... at a larger volume the ROAS dropped a bit obviously.

But still...not too shabby.

While my newfound "Facebook API hack" was effective, it still required a fair amount of repetitive manual work.

It involved copy-pasting, de-duplicating results and formatting. I would still spend hours on targeting research.

To save myself some time I decided to create InterestExplorer, my software that uses the Marketing API to reveal hidden interests in seconds - instead of hours ⏰

And that exact software became a huge success and is now used by thousands of Facebook advertisers that want to outsmart their competition.

Just like you I guess?

PS: To close the loop that started this story: I still work a part-time job that I really like. While it's not necessary anymore from a strictly financial perspective - my side gigs are still not my main gig ????

Don't take my word for it

I built something I needed myself.

Every single day I sell 15-25 software licenses using my own software for targeting and analysis.

But it's not just me...

Thousands of smart marketers use this software (from freelancers to the big firms).

Here's what they said about it:

You need to use a 3rd-party Facebook interest tool, because Facebook's own tools for targeting research are broken!

I assume you know this already.

But just to be sure OK?

When you're using Facebook Ads Manager and type in an interest into the detailed targeting section, Facebook shows a dropdown menu with related interests you could also target: "interest suggestions".

facebook ads interest suggestions

These are all broad interests, with large audience sizes.

The dropdown contains a maximum of 25 interest suggestions.

And Facebook shows the exact same interests to all advertisers.

Mmmm... ????

Why would they do that?

I have two theories.

My first theory is that Facebook wanted to simplify the ads manager interface to not scare off unexperienced advertisers.

My second theory is that they want us to target broad audiences (more impressions to sell) and compete against each other for the exact same audience - because that drives up the bids in the exchange.

Like a bidding war. 

Then there's Facebook Audience Insights...

facebook audience insights page likes

It's a great tool to find relevant page likes (Facebook pages your audience might like).

They are sorted by 'Affinity' to indicate their relevance to your audience. It basically means people in your audience are for example 2471x as likely to like the page compared to everyone on Facebook.

But because pages and interests are two separate things, you often can't target these pages with ads. Problem is; Audience Insights doesn't show you which ones...

The only way to find out is to copy-paste them into Facebook Ads Manager, to see if a matching interest shows up. If you have done this at some point, I don't need to explain the frustration.

So I came up with a clever idea to use the Facebook Marketing API again to build a solution.

I ❤️ Facebook's API.

I've built a Chrome extension that runs in the background when you use Facebook Audience Insights. All the pages that are displayed, will be automatically scraped by the extension.

It then sends these 'words' to the API to check if there is matching interest. If yes, it highlights these words with a "target" Emoji - so you'll know exactly which ones you can target.

Super simple, but very powerful. It will save you hours.

After extensively testing it with a group of beta users, I've decided to throw it in as a bonus when you purchase InterestExplorer (while I could very easily sell it as a separate offer). 

These pieces of software complement each other perfectly to help you find the best interests without spending hours.

Or worse...

99% of Facebook advertisers face these problems:

  • Everyone is targeting the same interests. 
    So in many niches they are saturated. And to be honest, in most cases they weren’t even relevant to start with. Facebook assigns “interests” very easily to people, based on their Facebook page likes, comments , likes, shares, website visits (the pixel is everywhere), etc. But think about it…how “interested” is someone in dogs if they liked a friends photo of their new dog, just to be nice?
  • Ad costs only keep rising. 
    At the moment there are around 6 million advertisers running Facebook ads - that number is growing. Every year the average CPM and CPC across industries rises. At the moment, in our highly optimised campaigns, we see CPM’s between $30 and $50. You can easily double that amount near the end of every quarter, due to increased activity from big corporate advertisers that need to spend their budget. If you need to pay $50 to show you ad to 1000 people and assume an average conversion rate on your website…it means you REALLY can’t afford irrelevance.
  • Bad targeting will cost you. 
    Facebook needs to balance their objective of generating revenue with their mission to be a platform where users want to spend time and engage. This means that if you show an ad to an audience that’s not interested in it (indicated by a low click-through-rate), Facebook will punish you with high ad costs. Let’s be clear, your ad is important. But a very mediocre ad targeted at exactly the right audience might work. While the perfect ad targeted at the wrong audience will never ever work. You'll just pay the price...

Having access to more (hidden) data means having an unfair competitive advantage. Who doesn't want that?

Facebook's tools are seriously lacking.

I've showed you that they just show a fraction of all targetable interests - or they don't show you if interests can be targeted. And I've explained what problems FB advertisers face because of it.

But...that's also a good thing.

I mean, it can only be an advantage to you to have access to more data - if your competition doesn't have the same access.

Because no-one speaks about the Facebook Marketing API, I would say at this point it's still one of the best kept secrets in the online marketing world

InterestExplorer, is built to eliminate all the manual work I was doing before. It's a fully automated solution for you to search, explore, select and export hidden Facebook interests.

Here's how it all works ????

Search for hidden interests related to any topic

Use the search bar to explore any broad topic you're interested in. Within seconds our software will use the Facebook Marketing API to reveal all related interests that can be targeted with ads.

Discover hyper-targeted interests in seconds

Sort the interests by audience size and use the search buttons to open a new tab with a search on Facebook or Google, to quickly assess the relevance of interests you're not familiar with.

Cherrypick the best suggestions to target

Clicking on an interest puts it in your selection box at the top of the page. You can then can copy the contents to the clipboard, save it to a project or export them to a downloadable CSV file.

Save and categorise your finds in projects

Save your interests into projects that you can continue to add to later on. You can create an unlimited number of projects to save and categorise your best interest finds.

Pick a language for localised suggestions

While the Facebook Marketing API will return most interest suggestions in English (en_US), you can also explore some additional interests in all of the other FB supported languages.

Create accounts for your team members

With our Team license you can invite an unlimited number of team members to create their own account. The only condition is that they're on the same email domain (@yourcompany.com).

Engage your clients

Many of our users run agencies. They wanted to create accounts for their clients to they could help find the best Facebook interests (clients should know their business best right?). Our Agency license allows to create up to 10 client accounts to involve them in the campaign setup.


I just wanted to thank you - and give you feedback on how well the InterestExplorer really works with my meditation funnel! I cloned one campaign, updated the target audience with the search results provided by InterestExplorer - and it is running now on €0,71 instead of €0,88 CPL.

Georg Martinka

So here's the deal ????

If you decide to get an InterestExplorer license today:

  • You'll have access to 1000's of hidden Facebook interests others can't find, without spending hours on research and checking if interests can be targeted. Your first searches will already reveal interests you would've never thought of yourself.
  • You'll put Facebook Audience Insights on steroids with our Chrome extension that highlights targetable interests. No more wasted hours of copy-pasting to find out if interests can be targeted, because you can see it at a quick glance. 
  • You'll get all future updates we add to the software - you'll never pay again.

Get our new Facebook tool as a bonus! 

We've recently built and launched a new tool...

It tracks your competitors and alerts you when they launch new Facebook ads. By default the alert is an email, but you can also connect to 100's of other tools through Zapier. Like Slack for example.

A free account to this tool normally allows you to create up to 3 active trackers.

But as a limited time bonus, I'll up the number of trackers to 10. 


Grab a lifetime license of your choice 

If you'd like to upgrade later on, you'll just pay the difference. 


Lifetime license


  • Unlimited Interest Searches
  • Unlimited Saved Projects
  • Unlimited CSV Data Exports
  • Chrome Exte​​​​nsion
  • BONUS: Adtrackr (10 trackers)
  • All Future Updates Included
  • 30-Day Money Back Guarantee

All prices exclude VAT which will be calculated at checkout.


If you decide to purchase our software and it doesn't meet your expectations, we'll refund your full purchase amount. Simple as that - no risk on your end. If you're not happy we don't want your money. Just contact us within the first 30 days to get a full refund.

DISCLAIMER: The results stated above are my personal results. Your results will vary and depend on many factors. This website in not a part of Facebook™ or endorsed by Facebook in any way. Facebook™ is a trademark of Facebook™, Inc.