2-3 bullets on the first screen and CTA – call to action (the first screen should cover 70% of the information on your offer, i.e. the fattest part should be at the beginning, especially if you have a large landing page).
Why you should be trusted – live reviews, regalia, awards.
Cases.
Stages of work.
What will a person get when they leave a request? You can give phone number library something for the request, for example, a free checklist or other goodies. This increases the conversion to the request, because a person is not always ready to leave a request right away, especially just like that.
Bonuses, discounts, gifts.
Guarantees, if any.
Handling objections.
Follow this formula using the example of a lawyer:

Keyword: "real estate lawyer".
In the ads "real estate lawyer".
The site has everything under the query “real estate lawyer”.
You have to match these 3 points. If everything is different, it won't work.