You will want to link tasks with Confluence pages, Jira issues, or other contents. Gantt chart tasks can have web links to arbitrary URLs. If tasks have web links, you can go to the URL when you click the task name.
URL protocol must be HTTPS, HTTP, FTPS, or FTP.
How to add a web link to tasks
Show the web link column.
Double click the cell of the web link column to start editing. And, write a URL in the cell of the web link column.
You can also edit web links with the task editor. The web link field is under the advanced tab.