Here is your guide to Amazon's 2nd annual Prime Day

Amazon is holding its second annual Prime Day on Tuesday, July 12 and the company is promising more than 100,000 deals across nearly all of its categories, including TVs, toys and electronics.

Here's the Who, What, When, Where and Why:

Who: The deals are only available for Amazon customers with Prime memberships. However, shoppers can sign up for a free 30-day trial to take advantage of the sale (don't forget to cancel if you don't want to pay the fee).

What: The company said the sale will be the "biggest global Amazon event ever," and new deals will roll out throughout the day, as often as every five minutes.

When: Members in the U.S. can shop starting at midnight PT.

Where: Shoppers can track deals on Amazon's app and also find them on its website.

Why: Amazon launched Prime Day last year to celebrate its 20th birthday.

Last Prime Day, Prime members purchased more than 14 million items from sellers and small businesses. This year for Prime Day 2016, more than 30 percent of Lightning Deals globally will be from sellers. The total number of Prime Day deals from sellers increased across all Prime-eligible countries and the number of small businesses and sellers worldwide participating in Prime Day increased more than 100 percent year-over-year, according to a statement released by Amazon.com.

This year, customers will be able to track an item with Amazon's app and sort by category if they are looking for specific products.