Walmart Inc. (NYSE:WMT) is shopping in the TV aisle to help grow its advertising business. The retail giant is in talks to buy smart television-manufacturer VIZIO Holding Corp. (NYSE:VZIO) for more than $2 billion, according to people familiar with the situation.

The move would give Walmart more places where it can sell ads and pitch shoppers on goods. Walmart, including its Sam's Club chain, has historically been Vizio's largest customer. Vizio is historically the largest television brand sold at Walmart by sales.

The discussions between Walmart and Vizio are ongoing, and a deal may not happen.