This is a feature that allows you to check the update history of the content. Please use it as part of your security measures.
The feature to restore previous versions of content update history is available in the Business and Enterprise plans.
For details on the features available for each plan, please visit the pricing page.
You can check it from the "Update History" in the content editing screen.

By clicking on "Update History," you can view the list of content update histories.
The history records everything from the initial creation (v1) to the current latest state.

In the update history list, you can check the following details:
There is no limit to the number of update history entries displayed. For notes regarding items without limit values, please refer to the Limitations / Notes.
You can filter the displayed history as follows using the tabs:
Clicking on any version (v◯ → v◯) will take you to a screen where you can check the differences between those versions.

For example, clicking on "v12→v13" will take you to a screen where you can see the differences between version 12 and version 13.

In the difference display of the Rich Editor (including the old Rich Editor), you can choose between two display formats: "Rich Text" and "HTML" to check the differences.

In Rich Text, you can see the content in a format that is almost the same as when you are editing in the content editing screen.

In HTML, you can check the actual HTML returned from the content API.

You can also change the version to compare from the select box.

When you select the version you want to compare, the comparison target will be replaced.

By clicking the "View Content" link for any version, you can restore the content as it was at that specified version and review it.

Additionally, the version of the history currently being reviewed will be displayed at the bottom right of the screen.

While reviewing a previous version, you can also overwrite the content with the current version by performing "Publish" or "Save as Draft".
Please note that the content of previous versions cannot be restored in certain situations.
The update history is recorded at the time of executing the following operations: