It’s only gossip if you repeat it. Until then, it’s gathering information.
Now the question arises :
Why do you need to learn and practice?
Is it helpful in hacking?
How should I do this?
Well if you want to find out all these above answers you have to read these articles?
And one thing if you want to tell you having a good intel of your target is always beneficial, It makes you feel highest in the room.