The categories member is a string list that describes the application categories to which the web application belongs. It is meant as a hint to catalogs or stores listing web applications and it is expected that these will make a best effort to find appropriate categories (or category) under which to list the web application. Like search engines and meta keywords, catalogs and stores are not required to honor this hint.
Manifest authors are encouraged to use lower-case.
List of known categories:
beauty
books
books & reference
business
cars
dating
design
developer
developer tools
development
education
entertainment
events
fashion
finance
fitness
food
fundraising
games
government
graphics
graphics & design
health
health & fitness
kids
lifestyle
magazines
medical
multimedia
multimedia design
music
navigation
network
networking
news
parenting
personalization
pets
photo
photo & video
politics
productivity
reference
security
shopping
social
social networking
sports
transportation
travel
utilities
video
weather