The phrase "award categories" refers to the different groups or types of awards that are given out for specific achievements or qualities. Full definition
You'll notice some new award categories for 2016, replacing some others that were no longer as effective as they once were. (clawbies.ca)
Other competitive award categories include traveling thematic show, architecture and design show, historical show, and commercial gallery exhibition. (magazine.art21.org)
Finally, you may have ideas for new award categories. (edutopia.org)