When creating your landing page, always make sure that it features exactly what is advertised in your Facebook or Google ad. When your ad and your landing page are congruent, this will increase your conversion.
So, when designing the landing page, keep in mind that the text, colors, font, messaging, and even the CTA should be consistent with your ad creative.
Maintaining such congruency will help reinforce your message to prospects and reassure them they get redirected to the right place after clicking your ad.