nThe majority of Internet Marketing, = Selling products and/or services online / on the internet, is still Most about Writing!
lE.g.:
nArticles for Article Marketing and E-Zines
nE-Books and other Information Products
nSales copy / copywriting
nAdvertisements
nEmail messages for Email Marketing
nAuto-responder messages
nProduct Guides and Product Reviews
nPay-Per-Click (PPC) Ad revenue generating web pages, e.g. using Google Adsense
nEtc. Etc.