If you're in a database like PubMed of PsycInfo, knowing about how to use operators can be useful. Increasingly, databases are adding AI layers that can interpret natural language questions and then generate a query with boolean operators for you. This query is used to find and retrieve info for you behind the scenes. However, it is useful to know basically what operators are good for and how to use them in your search.
Truncate roots of important words* to find plurals and more
*Truncation works differently in different databases. Check the help section of the database to learn what symbol to use and how to properly use it.
Use "Double Quotes" to find exact phrases
Exclude irrelevant concepts with NOT