According to the Canada Business Network, marketing is about determining the value of your product or service and communicating that information to customers. The path to good marketing starts with a well researched marketing plan evidenced by facts.
Here are some sources to assist you in creating a well framed marketing plan:
UBC Library has many, many books about marketing. The below are exmples; please search from the Library home page (Summon) to find the most up to date library content - suggested keywords: "marketing plan*". Consult with a librarian for help with this or other marketing topics.