I'm having trouble promoting my website, so I'd like to know how to solve them. What do you recommend I do to improve my website's search engine rankings?
To identify technical, structural, and content errors, you need to run an SEO checker. I personally suggest you do this using a service https://pr-cy.io/ Check out the tools currently available for this type of check and also check the basic user pricing. Then run the check, review the report, and draw your own conclusions.