Quick Gladi type question

I've got a lowbie toon which will oone day (not sure which century as it's not my main) become a gladi.

One of the skills is detect insect weakness. Now apart from spiders and ants, beatles? (assuming that what it says is what it does) what does this skill do?

gives a boost to pattack when fighting bugs i beleave
glads get a ton of those detect weakness thingies

You'll hit insects for more damage when the buf is on. You'll have other ones later for animals, plants, monsters (= beasts), dragons...
Check the attributes of the mobs to know what kind of mob it is and if you can use one of these bufs against them. A spider isn't an insect except for the game. And lizardmen are humanoids and not animals, etc..

its like kind of a hint of where to go i suppose :P You get them at various levels and the mobs around my level i usually use them.

It makes you bypass 10% Pdef of an insect mob if I were not mistaken.