Let's skip the textbook introduction and talk about what actually matters here — and what most people get wrong.
The single biggest mistake people make with
What you think sales is:
Slimy car salesman → pressure tactics → lying about features →
manipulating emotions → "always be closing" → fake enthusiasm
What sales actually is:
Finding people with a problem → understanding if your product
solves it → helping them make a decision → getting paid
That's it. Sales is problem-solving with a transaction at the end.
You already do this when you recommend a tool to a friend.