Hello,
Some advantages are:
1. They have jointed appendages, allowing for more movement.
2. It helps prevent the organism from drying out.
3. They help protect the organism from physical damage.
Disadvantages:
1. Exoskeletons must be shed, leaving the organism vulnerable.
2. Exoskeletons cannot grow.
3. Extra sensory organs are required for optimal function.
Hope this was helpful!