Update src/pages/messaging/agent-chat-api/v3.6/rtm-reference/index.mdx

Co-authored-by: Ola <[email protected]>

Author: lpmichalik

src/pages/messaging/agent-chat-api/v3.6/rtm-reference/index.mdx

@@ -2422,7 +2422,9 @@ Removes the agent from the list of customer's followers. Calling this method on
 
 ### Subscribe Customers
 
-Creates a subscription for customers. Response will contain customers currently matching the criteria. After successful subscription, agent will receive pushes about tracked customers on this rtm connection. If the number of tracked customers is exceeding the limit, push `subscribed_customers_totals_updated` will be periodically sent to indicate total number of customers currenlty matching the criteria.
+Creates a subscription for tracking customers based on the group they belong to. The response will contain customers currently matching the criteria. After a successful subscription, the agent will receive pushes about tracked customers on this RTM connection. 
+
+If the number of tracked customers exceeds the limit, the `subscribed_customers_totals_updated` push will be periodically sent to indicate the total number of customers matching the criteria at the given moment.
 
 #### Specifics