# Activity and history

The **Activity** page offers you the ability to see the evolution of project and [applications](https://docs.sonarsource.com/sonarqube-server/10.5/user-guide/applications "mention") measures over time.

Go to **Projects** > *Your project or application* > **Activity** to view a comprehensive list of the analyses on a file for a project (subject to [housekeeping](https://docs.sonarsource.com/sonarqube-server/10.5/instance-administration/housekeeping "mention")).

Graphs on the **Activity** page help you understand the evolution of up to three measures of your choice against each other. Graph mouseovers show the measure values and events associated with particular analyses.

## Events <a href="#events" id="events"></a>

The following table groups the events you can find on the **Activity** page:

| **Event**                 | **Description**                                                                                                                                                                                                                                                                               |
| ------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Definition change         | The application’s definition has changed.                                                                                                                                                                                                                                                     |
| Issue detection           | An analyzer used in the project has been updated.                                                                                                                                                                                                                                             |
| Profile                   | The [quality-profiles](https://docs.sonarsource.com/sonarqube-server/10.5/instance-administration/quality-profiles "mention") used to analyze the project has changed. Either the profile was edited, or a different profile was used for analysis. It also shows details about rule updates. |
| Quality Gate              | <p>The status of the <a data-mention href="quality-gates">quality-gates</a> has changed.</p><p><br></p>                                                                                                                                                                                       |
| SonarQube version upgrade | The SonarQube version has been updated. Appears after the first analysis following the upgrade.                                                                                                                                                                                               |
| Version                   | The project’s version has changed.                                                                                                                                                                                                                                                            |
| Other                     | An event was manually created on a snapshot. See [managing-project-history](https://docs.sonarsource.com/sonarqube-server/10.5/project-administration/managing-project-history "mention") for more information.                                                                               |

Events are also shown on the project or application’s **Overview** page.

On the **Overview** page, each analysis snapshot shows a measure variation compared to the previous analysis regarding number of issues, coverage, and duplications.