How To find a Library

How do you find a Library when the search comes up with 900 + results with every name under the sun.
I was looking for a simple one called "I2C.H" ( example only )
Why can't I find what I am looking for?

Find where? On your PC? On the web?

And yes, there are often multiple different libraries providing similar functionality. Each programmer has his/her own ideas which functionality is required so that is what he/she will implement.

Go with the Arduino one ?

It’s included as standard with the IDE.