Guild Wars 2

Hello!
I do not quite understand how the sigils work and how to choose them, so please help me with this problem. It seems to me that I am much-much weaker than all the other players, and someone told me that it’s all about sigils.
So, I need to equip my Reaper, Daredevil and Chronomancer.
I will be happy with every advice.

Sorry for my not perfect english and thank you!

https://wiki.guildwars2.com/wiki/Sigil

Most of the info you need is on this site.

Basically, Sigils are upgrades that you attached to slots in your weapons which do things in combat.

They have the following “triggers” which activate them:

1. Passive (always on, no trigger required)
2. Chance on hit (for example, a 30% chance to inflict Chill)
3. chance on critical hit (for example, a 60% chance to inflict Bleed on a critical hit)
4. On kill (either an instant effect like granting Swiftness or a stacking effect whereby each enemy you kill gives you more power)
5. On swap (for example, refill 50% of your endurance or inflict Bleed on nearby foes)
6. On Interrupt (for example, steal a Boon from a foe when you interrupt them)