You earn them whenever you buy games or if someone awards you a community award.

Steam points are a built-in currency you can use to customise your profile (by purchasing backgrounds and such from Steam Points Store), buy seasonal badges or award other people's profiles, comments or community content (be it screenshot, artwork, guide, etc..)

You gain Steam points for making purchases (buying games, community market purchases DO NOT COUNT) or by having your content be awarded.

Read FAQ:
https://psteamhelp.yuanyoumao.com/en/wizard/HelpWithPoints
https://psteamproxy.yuanyoumao.com/points/howitworks#Title

引用自 simmy びてき：

Steam points are a built-in currency you can use to customise your profile (by purchasing backgrounds and such from Steam Points Store), buy seasonal badges or award other people's profiles, comments or community content (be it screenshot, artwork, guide, etc..)

You gain Steam points for making purchases (buying games, community market purchases DO NOT COUNT) or by having your content be awarded.

Read FAQ:
https://psteamhelp.yuanyoumao.com/en/wizard/HelpWithPoints
https://psteamproxy.yuanyoumao.com/points/howitworks#Title

Thank you for elaborating.

Steam Points they are a digital currency on Steam you get Steam points from buying games, soundtracks, DLCs on Steam or by getting awards from other users, you can use Steam Points to buy profile backgrounds profile frames mini profile backgrounds animated avatars Steam Deck startups emoticons animated stickers on the points shop or award them to other users.
With Steam Points you can also buy badges to level up you're steam profile, a new Steam Points badge releases every summer and winter.

How do I get Steam Points?

Whenever you make a purchase on Steam, you'll be given Steam Points based on how much you spend. First, we convert this amount to USD, which then converts directly to the number of points you receive.

You will not receive any points for funding your Steam Wallet or for any Steam Community Market purchases.

You can also get Steam Points if someone from the community grants an award to one of your user reviews or other uploaded content such as screenshots, videos, guides, or Workshop items.

Learn more about Steam Points here:

https://psteamproxy.yuanyoumao.com/points/howitworks