4-5
Ranking factor 4: site architecture
Google wants to show relevant websites in the search results. Your website shouldn’t be a collection of random web pages. If you want to get top 10 rankings on Google, the pages of your website should be related.
Your web pages should show Google that your website is relevant to a certain topic. All pages of your website should be linked. If possible, web surfers should reach any page of your website with a maximum of three clicks.
The links and the directory structure of your website should make it easy to search engines to categorize the contents of your website.