What social media and social media marketing are
Social media is the set of platforms where people make and share content and respond to each other: Facebook, Instagram, TikTok, YouTube, X, LinkedIn, Pinterest, Snapchat, Reddit, WhatsApp, Threads. What counts is any platform whose content comes mainly from its users and whose core activity is sharing and reacting. By that test YouTube is social media, Pinterest is social media, and the messaging apps with public channels sit at the edge. "Social networking" is the older term, from when the point was connecting with people you knew. The modern platforms are about being fed content from people you don't, and that shift is why "building a following" means less every year.
Social media marketing, SMM, is using those platforms to reach customers: publishing from a brand account, building and engaging a following, buying ads inside the platform, working with creators who already have an audience, and listening to what people say about you and your category. "Marketing with social media" covers both the organic side (unpaid posts and community) and the paid side (ads), and the two behave so differently that this page covers organic and the paid social section covers the ads.
The benefits, as the question gets asked: reach to enormous audiences at low cost of entry; targeting by interest and behavior when you pay; a direct line to customers for service and feedback; the social proof of a visible following and visible responses; and, through creators and sharing, word of mouth at scale. The limit, which the "benefits of social media marketing" articles skip: organic reach for brand accounts has fallen for a decade on every major platform, so the organic side is now a presence and a proof, not a reliable acquisition channel on its own. The acquisition gets bought. The organic account is what the people you bought check before they trust you.
Organic social is the storefront window. The customers come in through the paid door, and they look in the window first.
