Update content/en/tracing/trace_pipeline/trace_retention.md

Author: OliviaShoup

content/en/tracing/trace_pipeline/trace_retention.md

@@ -148,7 +148,7 @@ To create a retention filter:
 <div class="alert alert-warning">Configuring a trace rate can significantly increase your indexed spans usage.</div>
 
 For example, if you configure a retention filter to index spans from `service:my-service`:
-- Configuring a span rate of `50%` ensures that approximately 50% of traces that contain spans matching `service:my-service` are selected. For selected traces, all spans matching `service:my-service` are indexed.
+- Configuring a span rate of `50%` helps ensure that approximately 50% of traces that contain spans matching `service:my-service` are selected. For selected traces, all spans matching `service:my-service` are indexed.
 - Configuring a trace rate of `10%` ensures that 10% of the traces selected by the span rate are fully indexed. For those traces, all spans in the trace (not just those from `service:my-service`) are indexed. Assuming traces have 100 spans on average and 5 spans from `service:my-service`, configuring a trace rate indexes the remaining 95 spans of the trace for the configured percentage of selected traces.
 - Span rate is evaluated first, and trace rate is applied only to traces selected by the span rate.