Importance of Stoichiometric Point in Titrations

[Holiday Parsons 2D]

Can someone simplify the idea of this graph if they have it from lecture (from 12/6 WED LEC) and simplify it in terms of the stoichiometric point relative to titrations? I attached what I drew below.

[Alyssa Bercero 3H]

The idea is that as the volume of the titrant (acid) increases, the pH decreases. At point A, the pH is high (basic) when no titrant as been put in, this indicates that the sample is a base. The midpoint is the stoichiometric point, which is at a pH of 7. This means that the sample and titrant are a strong base and strong acid respectively because the salt does not affect pH.