How the higher intent form works
Meta lets you choose how an Instant Form behaves at the moment of submission. The higher intent setting inserts one extra screen: the person is shown what they have entered and asked to confirm before it is sent. That is the entire mechanical difference.
Small as it is, that screen changes who ends up in your list. A stray tap no longer becomes a lead, because the accidental submitter closes the form rather than confirming. Someone who genuinely wants a reply reads the summary and taps again. The fields, questions and intro screen are all unchanged; only the deliberateness of the final action moves.
Why the higher intent form matters
Most lead campaigns are judged on cost per lead, which quietly rewards whatever setting produces the most submissions. That works until a person has to call each one. Then the real cost of a lead includes the salary of whoever rings it, and a list padded with people who do not remember signing up becomes expensive rather than cheap.
The confirmation step is the cheapest available correction. You do not have to build a landing page, rewrite the offer or narrow the audience — you accept fewer leads in exchange for a higher share of them being worth a phone call. For services with a long sales conversation, a considered purchase, or a small team doing the calling, that is usually the better trade.
Where the higher intent form goes wrong
The commonest error is switching to it and then judging it against the old cost per lead. Cost per lead will rise. If that is the number on the report, the change looks like a failure even when the business is doing better, and it gets reverted within a fortnight.
The second is expecting the setting to do work the campaign should be doing. A review step will not rescue a vague offer, an audience with no reason to buy, or creative that implies something free. Those problems produce badly matched interest, and confirming badly matched interest still leaves you with a bad lead.
The third is judging too early. Because volume falls, it takes longer to gather enough leads to compare fairly, and a decision made on a handful of submissions is a decision made on noise.
How to act on it
Set the comparison up before you switch. Record how many leads you currently reach, how many turn into real conversations, and how many buy, so there is something to measure against. Then run the higher intent form long enough for a meaningful number of leads to pass through the whole pipeline.
Combine it with the other honest filters rather than relying on it alone: say who the offer is for in the creative, state the price band or minimum on the intro screen, and ask one qualifying question. If those are in place and quality is still poor, the problem is upstream of the form, and your lead generation campaigns need a different audience or a different offer rather than a different button.