Landing page improvement: Have useful, original content. Promote transparency and foster trustworthiness on your site. Make mobile and computer navigation easy. Be fast at loading content.
A/B split testing (split testing means you run them at the same time). Testing web pages through google analytics. Make two pages that are slightly different and see what the conversion rate is per page. This will improve website.
This is the best website for helping you revamp your landing page, https://unbounce.com/landing-pages/landing-page-rehab/. The landing page is where the link takes you when you click on the advertisement.