Best practice in trade (deal). Books

[Freeman]

Hi, all!
I want to have good skills to trading and searching methods how to do it.
Can you give advice about good practice in trading? Interesting books.
Looking answers for questions:
* how to do people choose my products/service?
* how to do customers choose my products/service again?
* What about marketing?
More others questions.
Thanks.

[Harold Mansfield]

You need to learn marketing. You need to learn how to target a market, and create the kind of presentation that speaks to them, and then come up with a plan to get it out there.
Here's a free course that will get you on your way
https://www.udacity.com/course/app-marketing--ud719

[Freeman]

Harold Mansfield , great thanks!