Often Advertising and marketing are used interchangeably, but they refer to different activities. Advertising is only a part of the bigger game called marketing. Marketing comprises all facets of research, product branding, advertising and sales. Advertising is just a part of the process and involves spreading the word about the product.
The most costly part of the marketing a product may be advertising. It also constitutes behind the scenes work like the process involving formation of various strategies and coming up with the right one to target the viewers. For the home marketer advertising strategy consists of planning things like placing ads, deciding what media to use, what time, frequency and etc.. Typical advertising mediums are pay per click, classified online ads, search engine optimization (SEO), email, articles and blogs..
The majority of online marketers sell developed products for a commission so product branding is usually not part of their sales process. The work of finding a cost effective means to reach the right target for an affiliate product can be difficult and time consuming and it doesn't matter whether the business is located on a kitchen table or in an upscale high-rise office building.
Without advertising the development of products would stall, no buyers, no sales and then no products.