If someone's added a website shortcut to a space, you can click on the tab to open that website directly in the space.
When you're using a website tab:
Websites you visit can't access the microphone or camera.
You can't authenticate with some websites, depending on their policies.
Go to Messaging and select the space.
Click the tab with the website you want to open. If the space has two or more website shortcuts, you can find more shortcuts by clicking the last tab, which has a drop-down list of other shortcuts.