If you have an older computer, it may be VGA or DVI (the ones that are covered in holes). It’s likely going to be HDMI, mini-HDMI, a USB-C port with Thunderbolt and / or DisplayPort support, DisplayPort, or Mini DisplayPort. The first step is to figure out what outputs your laptop supports. Any modern laptop should be able to connect to whatever external monitor you have, but you may need to get creative. It doesn’t matter how big your laptop’s screen is - if you’re going to be doing any serious multitasking for work or school, connecting a monitor can be a big help.
