# Syncing an Audience
#### **Audience Build Confirmation Modal**
Before you confirm changes, you’ll see a summary of your **audience size** and **filter criteria**.
The summary also highlights **what’s changed** (filters added, removed, or modified) and any **difference in audience size**.
After you click **Finish** or **Apply**, an **AI-generated summary** of the changes is automatically created and saved to your **History Log**. You can edit it before confirming, or skip editing and confirm immediately.
Once confirmed, your audience will **run automatically during the next daily refresh!**
#### **60-Second Build Delay with Cancel**
After clicking Apply & Run, you have 60 seconds to cancel the build if you stay on the page. If you leave, the build starts automatically.
#### Apply Changes (Save Now, Run Later)
When you click **Apply**, your audience edits are saved immediately — but a new run doesn’t start right away. Instead, your updates will be automatically picked up during the **next daily refresh**.
Use **Apply** when you want to review or stage your changes without triggering a live run. This ensures your audience stays up to date without manual effort.
#### History & Restore
The **History Log** focuses on real impact and gives you quick actions:
* **Before vs. After:** open a side-by-side compare to see exactly which filters changed and how size moved.
* **Restore previous versions:** bring back any earlier confirmed setup with one click, or use **Reset** to return to the last confirmed setup used in your most recent run.
* **Who & when:** see who confirmed each update and the exact time.
* **Match Rate Log:** track quality over time; match rates for ad platforms update daily.
**Why it matters:** instant visibility, quick deep-links to your ad platforms, and easy rollbacks when you want to revert.
