Including a work in a collection means adding a work posted on pixiv (either your own or someone else's) to a public collection.
To learn more about collections, see this article.
How works are included in collections
- The creator of a collection adds your work to their collection
- The work appears as a tile within the collection
- You receive a notification letting you know your work was added
How works appear in collections
The privacy and age restriction settings of a work apply within the collection as well.
E.g.: If a work is set to "Logged-in users only", those who are not logged in will not see it even when viewing the collection.
Get notified when your work is included in a collection
You can choose to receive a notification when your work is added to a collection. To learn more, see your Notification settings.
If you don’t want your work to be included in other people's collections...
If you don't want your work to be added to other people's collections, you can change your settings in advance to prevent it. To learn more, see I don’t want my work included in other people's collections