Tailoring your traits and skills can be difficult for new and veteran players, especially with all the specializations and different combo's. LUCKELY there are good sites out there that help you create/share and use builds the playerbase uses in PvP, WvW, Raids, Strikes and Fractals!
Yes, you might have heared of Metabuild ingame. The site has the most variety in updated builds used by various players ingame. (This also means the builds can be or heavily broken or nerfed by Arenanet in a short time!) You can choose your class, and choose which category you want to play and try out different builds to your liking!
Check:
MetaBattle Wiki - MetaBattle Guild Wars 2 Builds for builds!
For fractals you might need a more "prestige" build and equipment. Discretize has high end builds for your team compilation with a class of your choice. The builds usually require some training but if you got your skill rotation figured out, Tier 4 fractals are no problem thanks to:
GW2 | Discretize [dT] – Fractal, Profession and Mechanics Guides
LET'S GO!
Raids can be a bit tricky, mostly requires alot of trial and error and great squad harmony. You might want to join a good discord server called GW2 Raid Academy (NA) (discord.com)
They host training's on NA servers so make sure to check that out! For a build according to you class you can check out
Guild Wars 2 Benchmarks, Builds, & Guides | Snow Crows
for builds, guides and benchmarks. GOOD LUCK!
Besides copying and storing build templates ingame there is a tool/Build editor where you can share your equipment, skills, traits and infusions with other players with a great site called:
When figuring out your build simply click "get quicklink" and share your build with other players outside the game!
GOOD HUNTING!