Greetings ma

these are person's or even entities who hold great percentage of crypto in their wallets which makes their influence on Steem space very powerful and influential.

Whales are considered influential people that have high influence on steemit. A vote from these whales means a lot considering their steem power and lots more. You are able to explain the roles of Whales in Steemit and how well it affects users. You've made a very nice entry, wish you luck 😊.