A system of classifying and organizing online content into categories by the use of user-generated metadata such as keywords is called a

Folksonomy.

Explanation:

A system of classifying and organizing online content into categories by the use of user-generated metadata such as keywords is called a folksonomy.

This ultimately implies that, folksonomy is a user-generated system which is typically used for classifying and organizing online content into various categories through the use of metadata such as keywords, electronic tags and public tags in order to make it easier to find in the future.

Hence, folksonomy is highly beneficial in areas such as collaborative learning, teacher resource repository, collaborative research, educational platforms, e-commerce etc.

the correct answer is: a.)it is never appropriate to use acronyms and emoticons in business communication.