Questions about pools

[Daniel Bracha]

I'm quite new to cryptocurrency and would really appreciate someone's help.
Can someone please explain to me how do pools work? Does it matter where the pool is (country/continent)? What's the best pool? And how to connect an ASIC unit to a mining pool?
Specifically, how good an antminer d3 would work in a pool?

 

[Lilly Heagney]

In this case you can take the advice of experts.