Question:  What is the significance of the endpoint in a titration?

Answer:

The endpoint of a titration is when the indicator tells you should stop titrating.  The equivalence point is when the amount of acid equals the amount of base.  Because of inaccuracies in pH meters and indicators, the endpoint and equivalence point aren't always the same.  Typically, we titrate with methods where the endpoint is very close to the equivalence point to minimize errors caused by differences in the two.

For example, if you're titrating a base with an acid, the point at which the indicator turns colors is the endpoint, because the indicator gave you the signal to end the titration.  The equivalence point is the point at which the solution has a pH of exactly 7.0000000 - unfortunately, there's no way of telling when this exact point is reached, which is why we use the endpoint instead.