# APM
By default, the Global tab opens. The user can choose the desired service, endpoint, and instance.
It is possible to select the display of specific data for the whole service, selected instance, or endpoint.
After selecting the Service tab, the user can see essential data collected for the entire service, such as average response time, bandwidth, or SLA and Apdex indicators. The results are presented in the form of a graph. It is also possible to select data collected only for a given instance or monitor the desired endpoint.
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# Agent Instructions: Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter:
```
GET https://revdebug.gitbook.io/revdebug/revdebug-features/apm.md?ask=
```
The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.