No, Chromebooks typically do not support Steam. Most Chromebooks only allow you to install apps from the Google Play Store and they do not have the hardware necessary to run Steam games. However, some higher-end Chromebook models may have the capability of running Windows programs, including Steam.
If you own a high-end Chromebook that is capable of running Windows programs, you can install the Steam client and start playing games. To do this, you will need to use a virtual machine (VM) like Parallels Desktop or CrossOver. Both of these options allow you to run Windows programs on your Chromebook without having to install Windows directly onto your device. Once installed, you can download the Steam client and start playing your favorite games.
Keep in mind that these options can be somewhat costly and may not work for all games, so it is important to do some research before deciding if this is the best option for you. Additionally, keep an eye out for updates from ChromeOS that may enable Steam support directly on the operating system in the future.
In short, most Chromebooks cannot natively run Steam games, but some higher-end models may be able to do so with a virtual machine and the Steam client installed. Be sure to do your research before deciding if this is the best option for you.