Amazon Prime Day officially got underway Tuesday, with the summer sales event slated to last through July 11. Competitors Target and Walmart are also holding multi-day sales events.

Amazon Prime Day is one of the biggest online sales of the year, but there are plenty of other alternative sales to shop as well. Although Prime Day will be held from July 8-11, several retailers are offering competing sales, some of which run throughout the month.

Take advantage of the limited-time deals on skincare favorites during Prime Day, like Medicube's Collagen Jelly Cream. It's now available at a lower price point with 55% off

Call it Prime Day, or Black Friday in July, but this week is expected to mark a major moment for summer spending. Why it matters: Billions of dollars are projected to be spent at Amazon and other retailers that are running competing sales.

Amazon extends Prime Day to four days and moves it up a week to get in front of tariffs. Walmart and Target plan competing sales events to capitalize on consumer worries.

The most popular stores, like Walmart and Target, are holding their own competitor sales during Prime Day. Here are all the sales to check out