"Filter" tab in Sentinel's logs page.

ben_loy 

You have to run a simple Query first, like:
Usage
|limit 10

Then this feature allows you to click on data, and [Apply and Run] which essential builds you a query - its good as you learn KQL or want to filter results (note it only shows top results) and if you add too many things at once it may build a query with no results 

So when I click on the above, the new query built for me was this:

Usage
| where DataType == "SentinelHealth"
| limit 10