Use the resources below to help you understand Boolean Operators (AND, OR, NOT).
BOOLEAN SEARCH OPERATORS
Boolean Operators help you effectively find the information you are looking for on the web using search engines such as Google.
Better search results with Boolean Operators...
AND - narrower results
OR - broader results
NOT - narrower results
Ninjas OR Pirates NOT "Ninja Pirates"
A video example of Boolean in action.
Video Source: https://goo.gl/sOFxAL
Still unsure about Boolean? You can also check out Mrs. G's Search Engines and Boolean Operators introductory lesson.