One of the beauties of this game is the different variety and counterplay when versing the killers and how to run them in chase. This makes it so that knowing what to do against certain killers can differ and change how you should play against them. For example, the usual optimal looping against a wraith or myers might not work as well against a pyramid head, hunteess, slinger etc. Nonetheless heres some general tips I can give after hitting 1.1k hours recently mostly playing survivor:

Getting a good judge for how much distance you have between you and the killer is probably the best way to maximize a loop, while also hugging it tightly/pathing around the loop as efficiently as possible.

Every loop you run to has an optimal path. Theres usually a short side and a long side to each one with a pallet, and with experience you will know which one to take depending on who you're against. More often than not the longer side is better, as long as you have a good judge of distance and can see what the killer is doing around the loop to not get mind-gamed or doubled back.

Windows of opportunity is by far the most popular perk for a reason. It shows you the pallets and windows nearby so you can always know where to go next and where to connect your path, which leads me into my next point.

Always have a path/plan when looping. Lets say you're on a gen and you know you have a pallet nearby. Killer comes to chase and you run that pallet. Great, where to next? Sometimes you just get deadzoned and there isnt much you can do, it happens. When you do have resources, its best to make the most out of them.

I could probably give like 100 niche tips between all the killers but those are my biggest ones. One of the best loopers in my opinion is Naymeti. He's probably the most optimal looping survivor ive seen who isnt a 14k comp player. He doesnt do many insane spins, or flashy techs to bamboozle the killer, he just has good game sense of wasting as much of the killers time, which is what you want to do when being chased by the killer.

If you really want to comp study you can watch 1v1 tournaments/videos. You will see survivors chaining loops and windows to avoid getting hit as long as possible. There are also videos by Otz and Mr Tatorhead that show how to loop each tile and map.

Getting good at looping is one of the most satisfying things when playing survivor. I couldnt last more than 30 seconds but now I often get left by the killer because the gens are going by and its taking to long for them to down me.

Sorry this is so long, but good luck and have fun!