What Is a Broker? How You Actually Buy a Stock

You cannot walk up to a stock exchange and buy shares directly. To actually own a piece of a company, you go through a broker — and today that usually means an app on your phone.

What a broker is

A broker (or brokerage) is a licensed, regulated business that buys and sells investments on your behalf. Stock exchanges only accept orders from their approved members, so the broker is the middleman that connects an ordinary investor to the market. When you tap “buy” in an investing app, your broker routes that order to an exchange and completes the trade for you.

What a broker actually does for you

• Executes your orders. It sends your buy and sell instructions to the market and gets them filled (see market vs. limit orders).
• Holds your account. Your cash and your shares live in a brokerage account, and the broker keeps records of what you own.
• Provides tools. Price quotes, charts, research, and the interface you place trades through.
• Handles the paperwork. Tax slips, dividend payments, and — for Canadians — registered accounts like the TFSA and RRSP.

Types of brokers

Discount / online brokers

These are the self-directed apps and websites most beginners use. You make your own decisions and place your own trades, and costs are low. Many now charge little or no commission on stock and ETF trades. They give you tools and access but do not tell you what to buy.

Full-service brokers

These provide personalised advice, financial planning, and a human advisor who can make recommendations or manage a portfolio for you. They charge more — often a percentage of your assets or higher fees — in exchange for that guidance.

Robo-advisors

A middle option: software builds and manages a diversified portfolio for you based on your goals and comfort with risk, usually for a modest fee. Good for hands-off investors who still want diversification without picking individual stocks.

How a trade actually flows

All of this happens in seconds, which is why it feels as simple as buying something online.

What to look at when comparing brokers

• Fees and commissions. Trading costs, account fees, and currency-conversion charges (important when buying U.S. stocks from Canada).
• Available accounts. Does it offer the registered accounts you want (TFSA, RRSP)?
• Regulation and protection. In Canada, reputable brokers are regulated and client accounts are covered by an investor-protection fund up to set limits if the firm fails. This protects against the broker collapsing — not against your investments losing value.
• Usability and tools. A clear interface and useful research matter, especially for beginners.

This is educational information to help you understand the landscape, not a recommendation of any particular broker.

The bottom line

A broker is simply the licensed connector between you and the market — the practical answer to “so how do I actually buy a stock?” Once you have opened and funded a brokerage account, placing a trade is straightforward. Choosing thoughtfully, and understanding the fees you pay, helps you avoid one of the quieter beginner mistakes: letting costs slowly erode your returns.