A share is a small piece of a company. Buy one share of a coffee chain and you own a tiny slice of every cup it sells, everywhere.
Companies you already pay every month, for coffee, streaming, a phone plan, might be listed on a stock exchange. Your spending is already funding someone's shares.
Spend €5 a week on coffee at one chain: €260 a year. A tiny slice of that becomes the company's profit, which a shareholder gets a cut of.
Liking a company's products is not the same as knowing if its shares are priced well. Being a happy customer and being a smart owner are two different questions.
Check the receipts in your wallet or your bank statement: some of those companies are listed, and you can look up their shares in minutes.
A share is a slice of a company. You might already be funding one, every time you spend.
Name 3 companies you pay monthly. Are they listed?