Competitive analysis. Sometimes, a stakeholder identifies the competition in the PPC space incorrectly. Competitive analysis helps me learn who the competition actually is and what they are doing to be successful in terms of bidding, keyword targeting and creative messaging. The competitive analysis helps me determine how aggressive I need to be in my account management policies in order to successfully compete in the marketplace.
The errors in technical SEO are often not obvious, and therefore one of the most popular. Mistakes in robots.txt and 404 pages, pagination and canonical URLs, hreflang tags and 301 redirects, http vs https and www vs non www versions: each of them can seriously spoil all efforts to promote the site. One quality SEO website analysis is enough to solve all the main problems in this part forever.