If you're working on crafting a search strategy that you intend to you return to repeatedly, edit, and revise, it can be extremely helpful to save that strategy in the database for later updates. Additionally, if you will need to report your database search strategies as part of a description of your literature review methods, saving a copy of your searches is essential.
Most of the core health sciences databases offer you the option of creating an account and saving your own searches. See the resources below for information about creating your personal database accounts and saving searches.
In addition to saving searches in the database account, it can be helpful to save them in an external document (e.g., Word document or Google document) where you can track changes in the search and make notes about useful/not useful terms.