You can assign one or more tags to images while uploading by clicking on the Advanced button in the Upload widget and fill the Add a tag input field before uploading an image.
In addition you can add, modify and remove tags for already uploaded images, by using our API. Here's our PHP API documentation regarding tags management:
It's on our road-map to support managing tags interactively through the Dashboard.
You can now manage your tags interactively through your Cloudinary 'Media library
Simply hover your image, click the kebab menu icon and choose "Manage" from the list of actions.
Click the Add a tag field and start typing your desired tag name, then click enter to add the tag to the list.
Repeat this to add more tags:
Click on the 'x' to remove a tag: