You can’t throw a rock today without hitting a screen-sharing piece of software. Especially today with all this casedemic bullshit. But most apps come with drawbacks.
Both parties need to have the same software installed and running. Most of the time that’s proprietary software. And most of the time screen sharing can be laggy and/or comes with a poor image quality.
Screego aim’s to fix that. It’s free and open source, good image quality and generally low letency. And all you need is a web browser. However, it’s worth mentioning that Screego only allows you to share your screen and nothing else. Not even audio.