Add Pinterest Ads source snippet documentation

Author: inkeep[bot]

contents/docs/cdp/sources/_snippets/source-pinterest-ads.mdx

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+You can sync data from Pinterest Ads by configuring it as a source in PostHog. The supported endpoints include Campaigns, Ad Groups, Ads, Campaign Analytics, Ad Group Analytics, and Ad Analytics:
+
+- [Campaigns](https://developers.pinterest.com/docs/api/v5/campaigns-list/) - Campaign entities from your Pinterest Ads account
+- [Ad Groups](https://developers.pinterest.com/docs/api/v5/ad_groups-list/) - Ad group entities within campaigns
+- [Ads](https://developers.pinterest.com/docs/api/v5/ads-list/) - Individual ad entities within ad groups
+- [Campaign Analytics](https://developers.pinterest.com/docs/api/v5/campaigns-analytics/) - Performance metrics broken down by campaign
+- [Ad Group Analytics](https://developers.pinterest.com/docs/api/v5/ad_groups-analytics/) - Performance metrics broken down by ad group
+- [Ad Analytics](https://developers.pinterest.com/docs/api/v5/ads-analytics/) - Performance metrics broken down by ad
+
+Additional endpoints will be added based on user feedback we receive via our [in-app support form](https://app.posthog.com/#panel=support%3Afeedback%3Adata_warehouse%3Alow%3Atrue).
+
+## Requirements
+
+- A Pinterest Ads account with permission to access data from the accounts you want to sync.
+- Your Ad Account ID from [Pinterest Business](https://business.pinterest.com/) > Ads > select your account > the ID is in the URL or account settings.
+
+## Configuring PostHog
+
+Connect PostHog to your Pinterest Ads account using OAuth. The Pinterest account must have permission to access the ad account data.
+
+1. In PostHog, go to the **[Data pipelines](https://app.posthog.com/data-management/sources)** tab.
+2. Open the **+ New** drop-down menu in the top-right and select **Source**.
+3. Find Pinterest Ads in the sources list and click **Link**.
+4. Enter the **Ad Account ID** of the Pinterest Ads account you want to sync.
+5. Select an existing Pinterest Ads account, or create a new integration.
+6. (Optional) Add a prefix for the table name.