If you own Ada coins, you should consider staking them in a pool to gain more profits especially if you a low number of coins. Ada staking pool allows individuals to get the most from the combined staking capacity. Generally, the Cardano Ada randomly picks pools to verify a new block and thus, combining your coins to create a bigger pool increases the chances of the pool being picked resulting in more profits. Once a pool is picked to verify a block, the reward is divided among the participants of the pool.
That said, it is highly important that you research deeply before joining a pool. The appropriate pool should be able to attract other individuals to stake their coins to continue increasing the staking capacity. The right pool should also not ask you to send your Ada to them as by staking you are only assigning the voting rights of your Ada to the chosen pool.