Could someone kindly tell me what all the common terms mean, highly recommended products and how to use them. i.e.

Snow foam lance (to fit a Karcher K series 4600) -
DA / Rotary -
Detailer -
Glaze -
Wax -
Clay bar -
How to remove swirls or dull patches? -
Two bucket method -
Clothes for drying etc. -
Wheel dressing -
Interior cleaner for fabric -
Quick Detailer -

Sorry if I come across as a complete numpty. I obsess over having my car clean and I wanna step up the routine in the best interest of my cars paint!

Its a black Focus mkII.

Thanks guys.