Research can get messy, and you will probably want to keep a record of your searches to ensure you aren't duplicating your efforts. This might mean a spreadsheet, or simply recording things in a notebook/word processing document.
A search log or search matrix is a way to keep track any databases you have searched, search terms you used, your search results, or other notes you may find helpful.
Find more information about keeping a search log in our get started with research guide.
