{% docs collection_id %}

The unique address identifier for the NFT collection. This field provides a blockchain-level identifier for grouping NFTs into collections and enables collection-level analytics and tracking.

- **Data type:** STRING (Solana address, e.g., 'EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v')
- **Business context:** Used for precise collection grouping, analytics, and to join with other collection-level data.
- **Analytics use cases:** Collection-level aggregation, cross-collection comparisons, and collection membership queries.
- **Example:** 'EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v'

{% enddocs %}
