27 Jul Number of Leads vs Conversion Leads: Which Meta Ads Goal to Pick?
Inside the Leads objective, Meta offers two different optimization goals — Number of Leads and Conversion Leads — and picking the one that sounds more sophisticated isn’t automatically the right call. For most businesses, the simpler option performs better.
What each one actually optimizes for
Number of Leads optimizes for people likely to share their contact information — the core action being measured is the form submission itself.
Conversion Leads goes a step further, optimizing for people likely to actually convert after sharing their contact information — not just submitting the form, but taking whatever downstream action counts as a real conversion for your business.
Why “more sophisticated” isn’t automatically better
Conversion Leads only works well when you can cleanly attribute a conversion back to the original lead. Businesses like real estate or coaching, where a lead’s later action (booking a viewing, signing up for a program) can be tracked and tied back to the original form submission, are well suited to this option — Meta actually has something to optimize toward.
For more generic lead generation — where the “conversion” after the form isn’t cleanly tracked or attributed back through the system — Conversion Leads doesn’t have reliable signal to work with, and tends to underperform Number of Leads in practice.
The current cost tradeoff
There’s also a practical cost consideration right now: the audience pool behind Conversion Leads is comparatively newer and less mature than the standard leads audience. Meta’s system simply has less accumulated understanding of who converts under this specific goal, which can show up as a higher CPM compared to the more established Number of Leads option. This is a current-state observation, not a permanent rule — it’s reasonable to expect this gap to narrow as the audience pool matures over time, so it’s worth periodically retesting rather than assuming this holds forever.
The practical recommendation
For most generic lead generation — the kind where there isn’t a clean, trackable downstream conversion event tied back to the lead — Number of Leads is the more reliable starting point. Reserve Conversion Leads for businesses with genuinely attributable conversions, like real estate, coaching, or similar high-consideration services where the path from lead to close is trackable.
This breakdown is written by Jason Gan, a Meta Certified Professional and Badged Meta Business Partner who has personally audited over 1,000 advertiser accounts since 2010. You can see real account breakdowns on the Jason Gan YouTube channel.
Frequently Asked Questions
What’s the difference between Number of Leads and Conversion Leads optimization on Meta ads? Number of Leads optimizes for people likely to share their contact information. Conversion Leads optimizes for people likely to actually convert after sharing that information — but only works well if you can properly attribute a downstream conversion back to the original lead.
Should I use Conversion Leads optimization for my Meta lead gen campaign? It depends on your business. It tends to work well for businesses like real estate or coaching, where a conversion can be clearly attributed back to the lead. For more generic lead generation without clean conversion attribution, Number of Leads is usually the safer default.
Why does Conversion Leads optimization sometimes have a higher CPM? Because the audience pool for this specific optimization is comparatively newer and less mature than the standard leads audience, Meta may not yet have as strong an understanding of who converts under this goal, which can push cost per result higher.
If you’re not sure which optimization goal fits your business
Book a Meta Ads Audit — $80 / 30 Minutes →
No login required. Just a screen share, your real lead gen setup, and a clear read on which optimization goal actually fits how your business converts.