noun

• Buying and/or selling in a market (street market or market fair).
  "Although Miss Pross, through her long association with a French family, might have known as much of their language as of her own, if she had had a mind, she had no mind in that direction […] So her manner of marketing was to plump a noun-substantive at the head of a shopkeeper without any introduction in the nature of an article […]"
• Buying and/or selling in a market (street market or market fair).
  "Marketing was a time-consuming task for truck farming families, as the round trip could take most of the day."
• (uncountable) The promotion, distribution and selling of a product or service; the work of a marketer; includes market research and advertising.
  "a bachelor's degree in marketing"