Just depends on the type of business you are running and all. I know when i started my candle business I promoted on social media, reddit,etc and even posted some ads in the newspaper when I went to different flea markets and honestly the flea markets were the most profitable to get it started. Going out and showing my candles and then word of mouth getting out I ended up with more and more customers. You just have to get your product advertised out there and then go from there.