TL;DR A dividend is a slice of a company's profit paid out to shareholders in cash, usually every three months — you get paid simply for owning the stock.
The plain-English version
Some companies take part of their profit and mail it to shareholders (well, deposit it in your brokerage account). Own 100 shares of a company paying $1 per share per year, and you collect $100 a year while doing absolutely nothing.
Mature, steady businesses tend to pay dividends — they generate more cash than they can usefully reinvest. Young, growing companies usually pay nothing, preferring to pour every dollar back into growth.
Dividend yield — the number people quote
Yield is the annual dividend divided by the share price. A $100 stock paying $3 a year yields 3%. It's like an interest rate on the stock — except neither the payment nor the stock price is guaranteed.
Typical healthy yields sit roughly in the 1–5% range. When you see 12%, don't celebrate. Investigate.
The yield trap (the common mistake)
Here's the mechanic beginners miss: yield = dividend ÷ price. So when a stock's price collapses, the yield rises automatically. A stock that yielded 4% at $100 shows 8% at $50 — not because the company got generous, but because the market thinks something is wrong, and often the next step is the dividend getting cut.
Extremely high yield is frequently the market pricing in a cut before it's announced. Chasing the biggest number is how income investors end up owning the worst businesses.
Four dates that matter
Companies announce (declaration date), then set a cutoff — own it before the ex-dividend date or you don't get this payment — then record, then pay. The only one to remember: buying on or after the ex-date means the next check isn't yours.
Why you care
Reinvested dividends have historically driven a massive share of long-term stock returns. They're also real cash — the least fake-able signal a business can send.
Educational only — not investment advice. A dividend is a promise a company can break, and the highest yields break most often.