Long line & tight line trolling when do you switch between the two?

Why Soak your line before spooling? i looked up videos on how to

Tight Line on Slabs

Loop to loop is bad - Try attaching your leader to the fly line

Preparing for the Guatemala Bait-and-Switch — Half Past First Cast

Compact Switch – Cortland Line Company

Fishing Lines: How to choose the right one - Berkley Fishing

Jacob Wheeler's Jerkbait System Explained: Rods, Reels, Line

How to Fish for Wahoo Using Slow Trolling Speeds

Trollin' on the river - Major League Fishing

The Art of Lure Trolling

How, When and Where to Pull Crankbaits for Crappie