Lead form extensions are now available for Google Search ads!
Google lead form extensions show beneath your search ad on mobile and tablet devices and allow users to provide their contact information directly through your ad on the search engine results page, rather than visiting a landing page.
This replaces the need for a user to visit your mobile site to convert. If the searcher is signed into their Google account, they’ll reach a Google-hosted form already pre-populated with their contact details and can immediately convert with one click!
All info can be found here.