Walmart spent years growing Spark, its own gig-economy delivery service. But Walmart Spark workers say challenges became clear in 2023.

• Walmart's Spark delivery service has become a significant part of its e-commerce strategy.
• But there are problems, from long wait times to drivers using false identities, according to workers.
• Here is Business Insider's reporting on Spark from the past year.

Walmart is trying to deliver more orders using its own employees and gig workers. Its Spark Driver app is a big part of that effort.