What is “overture” I have heard many people talk about it but what is it and also how do you find out what your is?

Overture Keyword Tool
Basically, to see what keyword fetched how much searches in the past month...so that ppl get an idea of investing in domains...websites?
Maybe there are many more uses but i myself am new

Overture tends to represent the statistics for a domain being searched on a monthly basis. As pair said the overture keyword tool helps provide one with this information making better decisions on domain purchasing.

Basicly the amount of times people search for a certain keyword over a period of time, on the Overture searc engine.

^ Exactly.