It’s like Prime Day held every July, just in October.
The company launched Prime Days back in 2015 and traditionally holds them during the summer months.
Amazon expanded the event to include Fall-based Big Deal Days beginning in October 2022.

Both events are exclusive to Amazon Prime members.
In short, they make the company enormous amounts of money.
Only Prime Day 2023 reportedly made Amazon more money.

Lucas Gouveia / How-To Geek |Hadrian/ Shutterstock
The company is offering regularly-scheduled sales events throughout the year to non-members as well.
This year alone has already seen five sales, from the week-long Memorial Day Sale to Amazon Pet Day.
The company also debuted a Big Deal spring event, which was open to all customers, in March.