In order to make your website visible to search engines we use search engine optimisation, as you have mentioned you need to edit the code, in this case we can add better title tags, meta tags can provide better content with the keywords on your website. We can finalise the keywords as well with which you want your site to rank in search engines. I request you to please share your website address, i will be able to analyse it and can share a complete report with you along with the action plan.