This break will be applied to items such as food, children's clothing and footwear, printed books, video game consoles, and more.
This government resource provides detailed information on what items qualify, including additional, specific information for restaurants, as well as how to apply the break as a business and what records to keep.
Given the short turnaround time from the announcement to the GST/HST holiday start date, the Canadian Federation of Independent Business has made available free counter signage to help your customers understand patience is likely needed during this time.
They also have a page with frequently asked questions on the program that may be help for your business.