Open a span for its details
With your trace still open, you can dig into any single step. The waterfall tells you the shape and the timing; for the details of one step, open the span itself.
Select any span row to open its details. Its attributes appear right below the row. Attributes are key-value facts on a span. Span attributes describe that one step, for example the request’s URL, the status code it returned, or the database statement it ran. Resource attributes describe where the span came from, for example the service name, host, or environment that produced it.
Everything the span recorded is grouped here. Scan the attributes to see what that step did and whether it’s where the problem is.
The details panel may also show whether this span sits on the trace’s critical path, meaning it’s part of what drove the end-to-end time.
A span’s name, its duration, and a couple of attributes are usually enough to tell what that step did and whether it’s the problem. That’s the whole loop: read the shape top-down, find where the time went, then open a span to confirm what it was doing.