Above the Fold Is Not the Same as Seen

Above the fold means an ad loads in the part of a page a reader sees without scrolling. It does not mean the ad was seen. A reader can leave before it renders, scroll past it in well under a second, or never look at that corner of the screen at all.

The phrase comes from newspapers, where the fold was a physical crease and the top half was genuinely what you saw on the news-stand. On a phone it means much less. The visible area is a few hundred pixels of an article that might be twelve thousand pixels long, and the first thing most readers do is push that area off the screen to get to the words they came for.

The measurement underneath the shorthand is viewability: whether an advertisement was actually on a reader's screen, as opposed to merely delivered to the page. The industry test, from the Media Rating Council and the IAB, is 50 per cent of the ad in view for one continuous second. There is a fuller treatment in viewability, and why served is not the same as seen.

Why does a top banner measure so badly?

Three reasons stack up on the same slot.

The reader arrives with a purpose, and the purpose is below your banner. They scroll immediately, often before the ad has finished painting. Then the page shifts as late-loading elements arrive, which can move the ad further up and out. And on a phone the header, the navigation and a cookie notice are frequently competing for the same few hundred pixels, so the banner shares the visible area with things the reader is actively trying to dismiss.

A leaderboard at the very top of the page is still worth selling. It is just not automatically your best placement, which is what the words above the fold imply to a buyer who has not thought about it.

Which positions actually hold the threshold?

This is the usual shape across content sites. Your own site will differ in the details and not in the order.

Position	How it usually measures	Why
Top banner, above the headline	Weak to fair	In view on arrival and often gone within a second, because the first thing a reader does is scroll to the article.
First in-content break, after two or three paragraphs	Strong	The reader has committed to the piece and moves past it slowly. On most content sites this is the best slot you own.
Upper sidebar on desktop	Fair to strong	It sits beside the reading area while the reader is near the top. On a phone the sidebar usually collapses to the bottom and quietly becomes a footer.
Mid-article, roughly half way down	Strong on long pieces, weak on short ones	It only measures if readers get that far, so your average word count decides it rather than your layout.
Sticky anchor on mobile	Very strong	It stays on screen by design. It also spends more reader patience than any other unit, so it is the one to frequency cap hardest.
Footer	Weak	It serves on every page and is reached by a small share of readers. The highest served count on the site and close to the lowest viewable one.

Rank your own positions against each other rather than against an industry average. The gap between your best slot and your worst is normally larger than the gap between your site and anybody else.

What is that gap worth in money?

Here is the arithmetic, with illustrative view rates rather than measured ones, because the only view rates that mean anything are the ones from your own pages. Take the same 40,000 served impressions in four positions, billed at $10.00 per thousand viewable impressions.

Billed at 10 dollars per thousand viewable impressions. The view rates here are an example to show the arithmetic, not measured data.

Same traffic, same rate, same month. The only variable is how many served impressions ever held the threshold long enough to count.

That is why a single rate across every placement on a site is a transfer of money from your good slots to your bad ones. The buyer who takes the in-content unit subsidises the buyer who took the footer, and the first one works out eventually.

Does making the ad bigger help?

A bit, and less than people hope. A tall unit crosses its own halfway mark while a smaller share of the page is in view, so a 300 by 600 in a sidebar tends to measure better than a 300 by 250 in the same position. Wide units get help from the threshold itself: Pyrobid counts units 500 pixels or wider at 30 per cent of pixels rather than 50, and the Media Rating Council applies its own lower bar of 30 per cent to large display units of 242,500 pixels or more.

What size cannot fix is position. A bigger ad in a place nobody reaches is a bigger ad nobody reaches, and doubling the height of a footer unit mostly doubles the page weight. Size is a second-order fix to apply after you have moved the slot somewhere people look.

What do you do about a slot that serves and never views?

Most of the fixes are layout rather than technology, and they take an afternoon.

The floor price point is the one publishers skip. A weak position is not a worthless one, it is a cheap one, and a cheap slot that sells every hour earns more than a proud slot that sits empty. That is covered properly in floor prices: the number that stops you being undercut.

How should you talk to a buyer about position?

Stop leading with where the ad sits and start with what it has to do to cost them anything. Above the fold is a claim the buyer cannot check and has heard from everybody. Billing only on impressions that held 50 per cent of the unit on screen is a claim they can check against their own numbers, and almost nobody selling their own inventory offers it.

That reframes the whole conversation about your above the fold placement. It is no longer a promise about layout, it is a description of what they are paying for, with the weak positions priced accordingly. The pricing method itself is in how to price ad space on your website.

Two honest caveats

Above the fold is still the vocabulary most buyers use, and correcting somebody who is trying to give you money is a poor sales technique. Quote the position they asked for, then add the measurement underneath it as the reason your number is what it is.

And viewability measured in the reader's browser, including ours, is honest measurement rather than independent verification. For a publisher selling a sidebar for a few hundred a month that distinction will never come up, and billing on confirmed views is already further than the buyer expected anyone to go. For a publisher selling five figure annual deals to a media agency it will come up, and the answer is to buy verification.