Using quotations in a search assures that the search only returns a match if it finds certain information in a certain order, which is done to limit the possibility of numerous, irrelevant matches. In essence, surrounding a phrase in quotes will return matches only where that exact phrase is located. For example to search specifically for the name John Anderson, and not every item that included the words John or Anderson, or John and Anderson, then the name could be entered surrounded with double quotations:
“John Anderson”
However, the double quotes search for an exact match of the phrase as entered. In this case the search for “John Anderson” would return only one result:
John Anderson
Items such as:
Anderson, John
John T. Anderson
would be excluded since they do not exactly match the string "John Anderson" as entered.