# Create blocklists

Within the "Blocklist" tab located in the "Account settings" section, you can manage a centralized blocklist across all bidders. There are various ypes of blocking rules available:

* **IAB category**: Choose the IAB category that you wish to restrict on your inventory.
* **Gambling**: You can block gambling categories by toggling this on or off.
* **Advertiser domain**: Input the advertiser domains you want to block, specifying one URL per line.
* **Geotargeting**: Determine whether to limit bid requests to specific countries or exclude certain ones. Note, this applies at the account level and is different to [restricting certain SSPs to specific geos](https://developer.nexx360.io/nexx360-account/account-settings/configure-bidders).
* **Authorized language**: Select what language you authorize for creatives.
* **Creative ID Blocklist**: If you have a specific Creative ID you want to block, you can add them here.

<figure><img src="https://1241802817-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MVMJXKa_WK7Z3tkpDoP-887967055%2Fuploads%2Fgit-blob-3b62a417dcf6a3c6cd98c71ac47647c97767184d%2Fblocklist-configuration.png?alt=media" alt=""><figcaption></figcaption></figure>

{% hint style="warning" %}
The information is transmitted in the bid request to the bidders.\
\
In the event that these limitations are overlooked by the bidders, Nexx360 conducts a check on the bid response to ensure compliance with the specified requirements. If the response fails to meet the criteria, Nexx360 blocks the bid.\
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It's important to note that this process relies on the goodwill of the SSP, as some SSPs may not furnish this information voluntarily.
{% endhint %}

{% hint style="info" %}
You can also manage the blocklist at the site level if you need to apply different blocklists depending on the inventory.
{% endhint %}