Factoring in math is the process of finding what to multiply together to get an expression. It is like "splitting" an expression into a multiplication of simpler expressions. When factoring, one looks for the greatest common factors that are shared by the terms in an expression. For example, in the expression 2y+6, the common factor is 2, so the expression can be factored into 2(y+3). Factoring is also the opposite of expanding. It is a fundamental concept in algebra and is used to simplify expressions and solve equations