AND means that two statements have to be true for the outcome to be true. For example 3>2 and 'Bob'=='bob' this would be false because only one of these statements are true.
OR means only one statement has to be true for the whole statement to be true. For example 3<2 OR 'Bob' =='bob' this statement would be true because one statement Is true.
NOT means that if a statement was true and you write not infront of it the statement becomes false. For example NOT 3>2 this statement would be false because it was true and now it not.
A Truth table is a table where 1 is true and false is 0
AND truth table
OR truth table