According toCNN, German-based Aldi has been expanding quickly throughout the United States.

That would make it the third largest supermarket chain in the U.S. behind Walmart and Kroger.

“I never underestimate them,” Walmart’s U.S. CEO Gregory Foransaid at an industry conferencein 2019.

Aldi store sign

“I’ve been competing against Aldi for 20-plus years.

They are fierce and they are good.”

Aldi’s biggest advantage is its ability to offer low prices without sacrificing quality via its ownprivate food labels.

Aldi employee

In fact, Aldi claims its prices are as much as 50 percent cheaper than traditional supermarkets, perCNBC.

So how does Aldi manage to keep its products so cheap?

While it carries only 900 core products, that limit keeps prices down for the consumer.

Aldi customers enter store

According toCNN, keeping less in stock also means Aldi doesn’t need as much space.

Gielens estimates that Aldi’s operating costs are about half that of mainstream retailers.

In addition, the company is making some eco-friendly, cost-saving changes.

Aldiannouncedin 2017 that it was remodeling some stores to bring in natural light and to utilize recycled materials.

The company encourages shoppers to bring their own bags or pay to use theirs.

“I am willing to do the extra work because the prices are amazing,” she toldCNN.

“There’sa lot of Aldi nerdsout there.

I didn’t realize that there were so many of us.”