Y intercept is where the graph of a function intersect y axis. X intercept is where the graph of the function intersects the x axis.
To find y intercept(s) of a function, substitue x = 0 and solve for y and you get y intercept.
Similarly, to find x intercept(s), substitute y=0 and solve for x.
Some times you get no solution (a contradiction), which means there is no x or y intercept for that function.