**React Native Project - Errors Marked in Red. Performance issues marked in blue.** **Sentry Groups issues by best in class fingerprint - a unique way to identity an event with information like stacktrace, message name.  Sentry automatically groups issues with similar characteristics.  For errors only, you can set up custom fingerprint rules under Project &gt; Settings &gt; Issue Groupings &gt; Fingerprint Rules**

**Sentry’s search provides you with reserved keywords like “is”, “user”, “serve”, and “browser” that you can use to search on the properties of issues, events, replays, and releases.  You can also create custom tags to which to search.   You can create custom tags by going to Project &gt; Settings &gt; Tags &gt; add custom tag.** 

**Sentry allows you to save searches for later use.   Name your searches so you can easily pinpoint issues that are important to you.  Save the search so only you can see it or expose it to the organization.** 

Here the developer saved a search for errors that are unresolved from a specific release 

**If Sentry is instrumented in both the front end and back end, the trace navigator allows you to see the distributed trace between the front and backend and any correlated errors.**  

**The span view we have the operations breakdown - shows you how much time was spent in each operations within a transaction – the breakdown is operation type, duration, and percentage of the total duration.**

browser
74ms
70%
resource.other
26.3ms
25%
resource.link
3.5ms
3%
Other
2.3ms
2%

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