Let’s take a look at the definition of these two words:
ADVERTISING
Pronounced: ad·ver·tis·ing ˈadvərˌtīziNG/
noun
The activity or profession of producing advertisements for commercial products or services.
Example:
“Movie audiences are receptive to advertising” advertisements collectively. “despite being instructed to take the signs down, he says he has no intention of removing the advertising.”
MARKETING
Pronounced: mar·ket·ing ˈmärkədiNG/
noun
The action or business of promoting and selling products or services, including market research and advertising.
Example: “The film had a huge marketing budget, there’s no wonder they had the highest box office draw!”