How to get Trading Cards and Badges on Steam?

ArtStation - Gloomhaven Steam Badges

Steam players can now earn coupons for new games by playing old ones

Steam Badges and level

Steam User Crafts Level 1,000 Snow Globe Badge, Level 100 Foil Badge for Good Measure – Techgage

What are 'trading cards', 'badges', 'gems', and 'booster packs' on Steam and what purpose do they serve? - Quora

ProtonDB Badges Steam Deck Plugin – Steam Deck Life

Valve launches Steam Badges on the service

What's the best level 5 badge?

Steam's Oldest User Accounts Turn 20, Valve Celebrates With Special Digital Badges - IGN

How To Level Up On Steam