Amazon's Prime Day is 4 days this year, and Walmart is fighting back with a week of deals of its own. How to score the best bargains this year.

This is the first time Amazon’s membership deals event runs for four days. The deals could give the digital economy a big boost.

Walmart just dropped the dates for its massive Deals Sale, rivaling Amazon Prime Day with even bigger savings this year. Here's everything you need to know about the sale and how to score the best early deals.