Question

Why do some people use floaters (salbabida) in swimming pools

Answer 1

       Floaters are used generally by the people those who do not know how to swim. The reason is that they may not drawn into water or to escape any eventuality that may arises while swimming in the pool.
      At the very begging the people don't know how to swim. To learn swimming they required some floating devices so that they can easily float. Especially, floaters help people to control the balance of their body in water.
      Note, the lifebuoy and life jacket are life saving things which float easily are to keep ready for safety of ferry commuter while boarding on boat or vessel. 

Answer 2

EXPLANATION:

Swimming is an art to balance your body in water against the force which is exerted by water on our body and the weight which is exerted on water. It is not so easy to keep this balance therefore people use floaters in swimming pools in early days of learning.

These floaters are filled with air that is lighter than air therefore it allows to float over the surface on water. Hence with the help of floaters, people can floats not sink in water.