Quote marks can make searches more specific, especially if you're looking for a specific phrase. They instruct the database search to hold all the words together in a specific order, rather than allowing them to be found scattered throughout the item record.
Examples:
Another use for quotation marks is to search for titles of articles. "In-hive patterns of temporal polyethism in strains of honey bees (Apis mellifera) with distinct genetic backgrounds."
Note--not everything needs quotation marks.It is helpful to attempt searches with and without quotation marks to compare results.
Truncation expands the search to locate all words beginning with the same root word. Most databases use an asterisk * to truncate.
Example:
Example: Teenagers AND Violence
Example: Teenager OR Juvenile OR Adolescent