One of the problems with designing websites for people has always been getting their pages to rank well on search engines. After 35 years of creating web sites I've mostly got that figured out.
But it is still necessary to test the pages we design to see how well they are listing. And the most popular search engine is still Google. And Google has a design feature which uses your past searches to optimize your current search.
Now, the easiest ways to stop this are probably to log out of Google each time I want to test and search from there, or to go into Private Mode on my browser.
Another way is to add a new browser in settings and make sure the drop down box for search engines is enabled, There's a neat little piece of code that can be added to the end of the URL to turn off Personalized Search Results.
Now, I use Flashpeak Slimjet as my default browser, and I make use of Speed Dial a lot in various browsers.
Simply entering the above URL in any Speed Dial in any browser will allow me to immediately open a Google Search page with the Personalized results turned OFF.
That means my results should be based on a 'clean' search with no bias towards my previous search history.