LG, the manufacturer, describes it as a "27" Full HD IPS LED TV monitor". So it is both a TV and a monitor. It has a DVB-S / C / and T tuner, so you can have cable, satellite and aerial reception. The listings with or without a hyphen are of the technically identical product. The performance of the speakers is not specified, but you can orientate yourself to the lower quality level here.

Yes, this screen allows access to the internet and apps such as Netflix and Disney+.

You could connect a Google Chromecast with Google TV 4K via HDMI, which would then allow you to install these apps (via the Google Play Store). There would also be a Full HD version of it, but I generally wouldn't buy anything that couldn't do 4K: Google Chromecast with Google TV 4K (Google Assistant)

No, this TV does not have a 3.5mm jack connection.