Go to Messaging and select the space.
Click Apps +, and then Add a website.
In moderated spaces, only moderators have the the Apps + tab. If you can't add a website shortcut, try asking a space moderator for help.
Enter a name for the shortcut and the website address.
Webex | Add a Website Shortcut to a Space
You can keep important information right where your team needs it, by adding a website shortcut to a space. Members can then click on a tab to open and browse a website from inside their Webex space.