seo

Try a plugin https://www.ads-software.com/plugins/search.php?q=seo

And read up on SEO tips from Google https://static.googleusercontent.com/media/www.google.co.uk/en/uk/webmasters/docs/search-engine-optimization-starter-guide.pdf

I would recommend you to do it yourself, Because has been made easy after recent Google updates
You need learn about few on page things like
Keywords research and using them in Description, and meta title, Site structure wise improvements, Once you are done with these your 60% SEO job is done, Let me know when you are done doing this, Will post about the next thing you need to do,