A authorised partner or sub-broker is an agent of a SEBI-registered broking platform like Dhan who works for a commission. According to NSE, a authorised partner is someone who doesn't trade themselves but executes trades on behalf of clients.
Think of a authorised partner in the stock market as someone who is tasked with:
Getting new clients on board on behalf of a stock broking platform
Executing trades on behalf of clients
Only a broking platform can charge brokerage fees. That's why sub-brokers are paid commissions through a profit-sharing model. That's not all.
Opening a stock broking franchise also gives you access to the broker's resources like the platform, trading APIs, and more. This can make your job as a authorised partner smooth and efficient.