BSD 1 / How To Redesign A Website And Not Lose Positions In Search Results

John Mueller, a webmaster and trend analyst at Google, argues that updating the layout design can impact search rankings, even though the site’s semantics and URLs remain the same.
https://www.seoquake.com/blog/how-to-redesign-a-website/
Bahamas, Boats, BSD 1 / How To Redesign A Website And Not Lose Positions In Search Results