Once there, you'll be greeted with the Windows Display settings page. Alternatively, you can open the Windows settings menu by pressing Win+I and selecting System then Display. To start, you'll need to right click anywhere on the Windows desktop and select Display Settings.
You'll likely want to adjust some settings, though, so let's take a look at that process. Once connected and turned on, the second monitor should automatically begin displaying an image as long as it's set to the right input.
If your PC doesn't have an available video port, be sure to check its specifications to ensure it supports dual monitors before running out and purchasing a second monitor or a dock. It's also worth noting that-while the vast majority of PCs support dual monitors these days-if you have a particularly out-of-date or underpowered machine, your PC may not.