This query is designed to analyze and summarize the usage of emoji reactions in Microsoft Teams. Here's a simple breakdown of what it does:

1. Data Source: It looks at events from Microsoft Teams, specifically focusing on actions where users have reacted to messages.

2. Filter Criteria:

   • It filters the data to only include events related to Microsoft Teams.
   • It further narrows down the events to those where the action type is "ReactedToMessage," meaning it only considers emoji reactions to messages.

3. Extracting Emoji Information:

   • It extracts the type of emoji used in each reaction from the event data.

4. Filtering Non-Empty Emoji Reactions:

   • It ensures that only reactions with an actual emoji are considered by filtering out any empty entries.

5. Summarizing Data:

   • It counts how many times each type of emoji was used across all reactions.

6. Sorting Results:

   • Finally, it sorts the emojis based on their total usage, likely in ascending order, to show which emojis are used the least to most frequently.

In summary, this query provides a list of emojis used in reactions on Microsoft Teams, along with how often each emoji was used, sorted by their frequency of use.