Steamworks Documentation
Events and Announcements Review Step
When an event or announcement is first posted or updated, it goes through a quick routine review step by Valve moderators. Until a post has been reviewed and confirmed, the post will not be visible in the Steam Library, including on the Library homepage and on the game's Library detail page.

How long does it take?

The review period typically takes an hour at most, with many posts reviewed within 30 minutes.

What is being reviewed?

This quick review process checks to help properly categorize your event and to confirm that any necessary mature content settings are appropriately applied.

While awaiting moderation, you'll see this note on your event detail page where the visibility stats appear:

ModerationNote.jpg

What should I do if it takes longer than an hour?

If your event is awaiting moderation for longer than a couple of hours, please let us know by using the contact form here: https://help.steampowered.com/en/wizard/HelpWithPublishing?issueid=929