Improved description for dataset selector in discover

Co-authored-by: Liza Mock <[email protected]>

docs/product/explore/discover-queries/query-builder.mdx

@@ -25,7 +25,7 @@ There are five main building blocks that impact the results of your saved query,
 
 ## Dataset Selection
 
-The dataset selector allows you to choose between querying for errors or transactions. This will determine the type of data you are querying for. You can only query one dataset at a time. The errors dataset will return events related to errors, while the transactions dataset will return transactions events for viewing performance data. 
+The dataset selector allows you to query for either errors or transactions. You can only query one dataset at a time. The errors dataset returns events related to errors, while the transactions dataset returns transaction events that help you see application performance. 
 
 ## Filter by Project, Environment, and Date Range