Explain the relevance of using the following criteria when questioning for information on the internet,?

+, -, NOT, AND, ""

Explain the relevance of using the following criteria when questioning for information on the internet,?

1+2 will find i tems beside both 1 + 2 in them

1-2 will find items beside 1 in them but not if they also hold 2

The logical-negation (logical-NOT) operator produces the significance 0 if its operand is true (nonzero) and the value 1 if its operand is false (0).

The logical AND symbol is used surrounded by Boolean algebra to indicate a conjunction between two statements. A conjunction is true if, but only if, both of its components are true.
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My suggestion is.....stop person lazy and look it up.