I recently chatted with an early-stage entrepreneur who built an app that enables businesses to accept almost any payment method. As I learned about the problem he’s solving, he mentioned that his target customers are “micro SMBs.” That caught my attention—I liked that framing.

“SMB” stands for small and midsize business. It’s normally applied to any company that’s not a huge enterprise. This bucket is pretty wide. For example, a midsize company might be a retailer with $75 million in annual revenue and 150 employees. A small company might be a graphic design shop with 10 employees doing $1 million in revenue. Though they’re both SMBs, their complexity and problems differ wildly.

The micro SMB is the smallest business in this group. I think of it as solopreneurs (i.e., the founder is the only employee) and teams of up to five people doing $500,000 or less in annual revenue.

For many years, I’ve been bullish on building a business that solves problems for SMBs as a way to build a large business. According to an older book by Verne Harnish, only 4 percent of businesses in the U.S. have revenue of more than $1 million a year. Translation: the market to serve small businesses is huge. If you can solve a problem they have, you can get a lot of customers.

I love going after micro SMBs because they don’t expect perfection, there are tons of them, you’re usually selling to the owner, and they make purchase decisions quickly. Solutions to problems they couldn’t solve themselves and solutions that significantly free up their time so they can work on other parts of their business do great in this market. They’ll often buy on the spot if you check either of those boxes.

One knock against micro SMBs by investors and founders has to do with the process of selling to them. Price points for solutions in this market are often lower, which means you can’t afford outbound sales teams in many cases. That’s true, but I don’t think it’s a negative. I think of this market as more of a prosumer market. You’re marketing to a sophisticated consumer who is more willing to spend than the average consumer. Instead of outbound sales, strategies that gain this customer’s attention or educate them can attract them. Easier said than done, but highly effective when done strategically.

My conversation with this founder crystallized something for me. I like serving the SMB market, but I love serving the micro SMB market. It’s a tough-looking market, but once you nail it you can build a massive business with customers who often won’t consider switching solutions because they’re too busy running their small business.