If the page is already created,
1. I check the Google search console what are the keywords arriving to the landing page and see if those are relevant.
2. Conduct keyword research and used the distribution of the keywords 1 – huge search volume, 2 average search volume 2 long-tailed high converting keywords.
3. Review the page content if the text, images, social proofs, and other converting factors are present.
4. Make sure the profer meta title, description, keywords are inserted to the content
5. Review the layout structure and recommends if needed. Usually I got for bulleted text with top heavy advantages of the product and service. I make sure the problem and solutions are stated clearly.
6. The mobile should be top-heavy preposition too. Making sure the first and 2nd fold have enough information to convert
7. I used hotjar to review the behavior of the visitors.
