Use Tags
Oura's Tags feature lets you explore how a specific activity, feeling, or choice affects your quality of sleep and Readiness. By using Tags, you can develop a better understanding of how certain choices impact you. Keep in mind: tags won't impact your daily Sleep, Readiness, or Activity Scores. You can observe how Tags impact your metrics by viewing them in Trends.
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Open the Oura app.
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On the Home tab, tap on the 
icon in the bottom right-hand corner.
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Tap Add a tag.
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Select one or more tags from the provided list by tapping on them. Set the Date and time for your tag(s).
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You can also add a comment to your tag. To do so, tap Add a comment and enter your note using the keyboard on your device.
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Tap Done to save the tag.
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Once the tag is saved, it'll appear on the Home tab. To view the tag, scroll down. Your newly added tag will be listed under Activities.
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You can also view your tags in Trends. To do so, go to the menu 
in the upper left-hand corner of the Home tab.
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Tap Trends.
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Trends let you see how your personal metrics have changed over time. Tap on the tab you'd like to learn more about, then tap on a metric. For this example, we'll use Readiness and Heart rate variability.
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The selected metric is displayed. The newly added tag is visible under Tags for.... A 
icon will also appear under the days where a tag has been added.
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You can highlight days marked with the same tag. To do so, tap the text box under Highlight days tagged with.
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Tap on your newly added tag.
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The days marked with the chosen tag will appear highlighted.
Now that you have successfully added a tag, check out how you can manually add a workout to Oura.
