SharePoint search best bets is a feature that has been available in earlier versions of SharePoint. Best bets are defined based on simple rules where the administrator can choose which search results should be returned based on the search query your users are searching for. Many organizations use best bets to clearly define an authoritative source for the most typical type of content users are searching for. If you define key audiences in your organization and the type of content they would most likely search for, you can point them to that content source using a best bet list. This feature can be used in conjunction with SharePoint search analytics to determine the most common types of search queries that are being performed by your users. This way, you're not starting from square one when defining your best bets.
As a result of this exercise, many organizations come up with an extensive list of best bets which can be cumbersome to add using the SharePoint...