Update frontline-usage-report.md

Author: ali7365

microsoft-365/frontline/frontline-usage-report.md

@@ -71,8 +71,11 @@ Each row in the table represents a team.
 |Team name |The name of the team.|
 |Team ID   |The ID of the team.|
 |Total members|The total number of users on each team.|
-|Active users|The number of active users on each team. Users are considered active if they signed in to Teams one time during the selected date range. |
-|Last activity date    |The last date on which the user signed in to Teams.|
+|Active users|The number of active users on each team. Users are considered active if they signed in to Teams at least one time during the selected date range. |
+|Active Walkie Talkie users|The number of Walkie Talkie users on each team. Users are considered active walkie-talkie user if they used walkie talkie at least one time during the selected date range. |
+|Active chat users|The number of active chat users on each team. Users are considered active chat user if they posted at least one message in a private chat during the selected date range. |
+|Active channels|The number of active channels on each team. Channels are considered active if they have at least one active user during the selected date range. |
+|Last activity date|The last date on which the user signed in to Teams.|
 
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