Hi I Have these equations and I don't know and understand what each of them means.
Can someone help me?

$$\tag 1 v=v_0+at$$
$$\tag 2 x=x_0 + v_0t+\frac{at^{2}}{2}$$
$$\tag 3 v^{2}=v_0^{2}+2ax$$
What does each of them do at certain distance, acceleration and velocity?
At class the teacher didn't explain us  how each of these formulas work.