Split errors and transactions description

docs/product/dashboards/widget-builder/index.mdx

@@ -48,15 +48,19 @@ A big number visualization displays the current value of a single function. This
 
 ## Choose Your Dataset
 
-In the dataset selection step, choose which type of data you would like to use in your widget. This data is classified into four different datasets: [errors](#errors--transactions), [transactions](#errors--transactions), [issues](#issues), and [releases](#releases).
+In the dataset selection step, choose which type of data you would like to use in your widget. This data is classified into four different datasets: [errors](#error), [transactions](#transactions), [issues](#issues), and [releases](#releases).
 
-### Errors & Transactions
+### Errors
+Choosing "Errors" allows you to query and aggregate error events in the same way you would for a [Discover Query](/product/explore/discover-queries/). This data is comprised of errors that occur in your application, which Sentry will use to group into issues. Some widget examples include:
 
-Choosing "Errors" or "Transactions" allows you to query and aggregate error, or transaction, events in the same way you would for a [Discover Query](/product/explore/discover-queries/). Some widget examples include:
+- Users most affected by errors
+
+### Transactions
+
+Choosing "Transactions" allows you to query and aggregate transaction events in the same way you would for a [Discover Query](/product/explore/discover-queries/). This data is comprised of events that track the performance of operations in your application. Some widget examples include:
 
 - Tracking performance of an endpoint
 - Throughput by country
-- Users most affected by errors
 
 ### Issues