In a Google Webmaster Office Hours Hangout, Google’s John Mueller was asked whether a call to action placed at the top of the page and above the main content would trigger a negative ranking effect. John outlined two scenarios under which it would and would not cause a negative ranking effect.
Google Page Layout Algorithm
Google released an algorithm in 2012 that added a negative ranking factor to sites that featured excessive advertising at the top of the page that made it difficult for users to see the main content.
The original announcement from 2012 stated:
“…sites that don’t have