This feature allows the user to easily load two websites side by side, which can be highly effective for needing two separate tabs on the screen for various purposes. Effectively, it creates the same benefits of having two browser windows open and utilizing MacOS's split screen feature.
I have often used this feature during two instances:
While on a video conference call (such as Google Meet). Half of my screen is the google meet tab, while the other tab is a notes document where I am taking meeting notes.
While performing research. The first tab is my research notes document, while the other tab is for searching and reading links from search engines.
I have been using this feature on the Arc browser and Edge browser for the past year, and I can confidently say that it's one of the defining features that keep bringing me back to these browsers. The best execution I have seen is in the Arc browser, where you can Option + Click on any link and automatically open it in the screen split screen mode alongside the currently open window.
I would love for Orion to adopt this idea.