In 2023, there's three video ports that matter on a modern business monitor. Other than the first one, none are essential for everyday business scenarios and their inclusion should be weighed against their overall value-for-money performance.
 HDMI port Present on almost all recent monitors, it can carry audio as well - but not power - and offers resolutions of up to 8K. The current gold standard is HDMI 2.1 which offers higher refresh rates (up to 120Hz on 4K). It won't matter so much for business applications though.
 DisplayPort Some monitors have DisplayPort connectors that are compatible with Thunderbolt 3 or 4 as well as USB Type-C (and USB 4). Should your computer support Multi-Stream Transport mode (MST), you should be able to daisy chain two monitors or more.
 Type-C It is probably the most complicated as it is associated both with data and with video (although technically the latter is a subset of the former). A Type-C connector can either support USB or Thunderbolt protocols (look for the lightning symbol) and can deliver.
Beyond those three are other ports; audio ports that allow you to output to a headphone or USB ports (flat or square) that can either power other devices (a feature called power delivery) or use the monitor as a hub.