When creating a lead ad in Meta Ads, the new 'Chat with leads' feature can be enabled for immediate follow-up with leads. Upon filling out the form and opting to chat, a Messenger conversation starts right after submission. Additionally, users will see a 'View in Messenger' option on the thank you page to access the conversation thread.
To enable this feature, create a new 'Leads' campaign and choose 'Instant forms' as the conversion location at the ad set level. In the destination section at the ad level, select or create an instant form. Finally, check the box under 'Follow up with leads' to activate the 'Chat with leads from instant form' feature. This can enhance lead nurturing and immediate follow-up.