Technical audit of the site

Working on the site:
1 . Set up tasks for programmers to work with scripts on the site, adding elements to the site
2nd Install the .htaccess file (click the domain with and without www)
Three Creating and adding a robots.txt file
4 . Verification of validation code
and 5. Recommendations for improving the web site
6 . Link to duplicated pages
7 . Verification of the relevance of meta tags (title, description, keywords)
8 . Recommendations for increasing the relevance of a page to a keyword