There are three ways to save a search:
Click the star icon near the end of the search bar.
Select Save from the options menu at the right side of the search bar.
Select Save from the options menu at the end of a row on the Search Activity tab.
In the Save Query dialog that opens, enter a name and then click Save. The saved search is added to the Saved Search tab.
Note
If you save the query with the same name as an existing saved search, the new query will overwrite the existing saved query.