Water conservation
Water conservation mainly refers to the protection, preservation, and control of the usage of water and its resources. It describes the watchful usage of water and covers all the techniques, practices, and efforts employed to preserve water quality and supply. It involves programs and approaches focusing on pollution prevention and fair water distribution. Water conservation efforts aim to maintain water levels for current and future use by avoiding overuse and water waste, which can lead to scarcity  . It deals with the efficient usage of water in order to prevent wastage and not lead to scarcity.
There are different ways to conserve water, it can be as simples as
 Keeping the tap closed when not in use.
 Check for the openings or leaks in water distribution pipes.
 Make sure to use collected rainwater for gardening, washing or other water needing purpose.
  Always have a measure of how many buckets of water is wasted in a day and try to reduce.
  Do not run more water than necessary while washing and cleaning clothes, utensils, etc.
  Do not prolong  bathing. Go for a quick shower rather than wasting buckets of water
  BENEFITS OF WATER CONSERVATION
Reduces costs.

References
https://byjus.com/biology/how-can-we-conserve-water/