Content or blogs you publish to educate your audience about the products or services you offer on a broader level falls under Content Marketing. These blogs are then picked up by Google to match with users query and a relevant user reads your blog is basically falls under SEO.
One of the widely used channel to increase sells and leads online is performance marketing or paid marketing. Basically you start campaigns on Google search engine or different website to show ads to relevant audience by selecting proper targeting. This in turn helps business generate sells.