Keeping Bing as your default search engine provides an enhanced search experience in Microsoft Edge, including direct links to Windows 10 apps, more relevant suggestions from Cortana, and instant answers to questions about Windows 10.
You can change the default search engine to any site that uses OpenSearch technology.
In Microsoft Edge , first go to the website of the search engine you want.
Then, select More actions > Settings, scroll down, select View advanced settings, scroll down again, and then select Change search engine.
Select your search engine's website in the list, and then select Set as default.
If you don't see your search engine in the list, make sure that you've visited the search engine's website in Microsoft Edge and that your search engine uses OpenSearch technology.