This integration must be installed and connected in Notion. If you don't have a Notion account yet, get started with Notion for free here.

In your Notion workspace sidebar, select Settings & members
Head into My connections → Discover new connections → select Zendesk and Connect
On the Connect to Zendesk screen, insert your Zendesk subdomain
Follow the prompts to complete the sign-in and authentication process

To create a preview of Zendesk tickets in Notion pages, copy the link of any Zendesk ticket link, paste it into Notion and select Paste as preview
To link Zendesk tickets to items in your Notion database, add a new property to your database using the + button at the top right of your database and select Zendesk Ticket If it’s your first time using Zendesk with Notion, you will be prompted to authenticate the integration following the steps outlined above in the *How to set up the integration** section. Once connected, you will see a detailed preview of the linked content in Notion

Notion