virus problems on a pc

https://www.google.com/chrome/cleanup-tool/index.html

https://www.safer-networking.org/dl/

testing web site speed

https://developers.google.com/speed/pagespeed/insights/

check web site for malware or virus

https://transparencyreport.google.com/safe-browsing/search

SEO tricks

site:domain.com
this will list out everything google has for your domain

SEO 2018

https://searchengineland.com/8-game-changing-seo-trends-that-will-dominate-2018-286023

Check and make sure your ssl is working correctly

https://www.sslshopper.com/ssl-checker.html

simple CMS

https://sitecake.com/