That's a really broad question, and it can't be answered in a two paragraph internet post, much like your questions about collection and engagement.
I applaud your desire to learn, and would be happy to help, but it doesn't make a whole lot of sense to type an entire book on horsemanship into the computer.
Let me suggest this - do some research on your own about the terms you're curious about. Even typing the term into this board's search feature is a start.
When you have *specific* questions or want a detail clarified, rather than "tell me everything you know about ___________, what it is and how you do it." you'll get better quality responses.