Hey there! My name is gamingcentre23, I'm a jungle main and Elise has been by far my favorite jungler. Elise is a strong early/mid game AP bruiser who can burst down targets quickly, although she has a very high skill cap she can be very fun to play

Pros:
+ High Burst
+ Amazing Ganks
+ Amazing Counter Gank
+ Good Escape
+ Ultimate at level 1

Cons:
- Lacks "Ultimate" Ability
- Weak Against Counter Ganks
- Squishy Early
- Hard to Master
- High Mana Costs

Elise's Cocoon gives vision of stunned targets even if they're invisible.
- Rappel reveals the area around it, this can be used to jump to camps or nearby enemies in bushes.
- Taking Volatile Spiderling not only gives you a strong start but can provide bush checking against invaders.
- Spiderlings from your passive ( Spider Swarm) can tank damage from monster camps for you.

Your first basic combo is crucial in ganking, it will usually drop anyone to about half or lower.
Cocoon-> Venomous Bite-> Volatile Spiderling-> Venomous Bite-> Skittering Frenzy.

Your second combo utilizes your Rappel as a gap closer and is only good for chasing down low health targets.
Rappel-> Venomous Bite-> Skittering Frenzy

When jungling start on your bottom side jungle, your support and adc give a much better leash.
When clearing camps you want to take the least amount of damage so you can be nice and healthy for either another camp or ganking. With Elise you can make your spiderlings tank the damage by walking out as the camp attacks then walk back in. When your spiderling dies switch to Human Form, use some abilities and swap back to Spider Form for more spiderlings. Try and swap the damage between you and your spiderlings.