what does "give a geometric interpretation of this result" mean?

Question

let f(x) = 3x^5+5x^4+2x^3+8x-4. Find lim h --> 0 ((p(x+h)-p(x))/(h))

Answer 1

The limit is 15x^4+20x^3+6x^2+8 and geometrically represents
the slope of the tangent to the curve at the point( x,f(x))