[Veuxdo]

This is a good point that I'm glad you called out. Having a logo is marketing. Having a website is marketing. Every blog post, tweet, like, reshare, etc. is marketing. This comment could be considered marketing if you look hard enough.

[imtringued]

Marketing is the act of bringing a product to the market in such a way that it is received well.

Product, price, place, promotion.

All of those are marketing. Yes, even the product itself is marketing. When people claim they are not doing marketing, but going by word of mouth, they are using the product itself as marketing.