Monday was Cyber Monday, the day people return to work from the long Thanksgiving weekend and then hit the internet in search of holiday shopping deals.
More than 131 million Americans were expected to go online for the shopping deals.
Online retailers are cutting prices to lure in bargain hunters.
Cyber Monday has been losing some of its luster as more people shop online over the holiday weekend.
IBM Benchmark, which tracks e-commerce for 800 retailers, says online sales on Thanksgiving rose nearly 20 percent this year compared with 2012.
As for regular shopping over the weekend, research firm ShopperTrak says shoppers spent nearly $10 billion at stores in the U.S. on Black Friday.
That's a 13 percent drop from a year ago, but it may also be due to the fact that many stores opened on Thanksgiving instead of waiting until Friday.
ShopperTrak says the combined spending over Thanksgiving and Black Friday rose 2.3 percent over last year.