Depends on the type of marketing, at a large corporation this is broken out into various functions as a lot of roles roll up into marketing. Some categories:

Advertising - digital, physical

Analytics - web traffic, roi analysis, data-mining, segmentation etc

Brand marketing - ads, identity / messaging, etc

Content - creating new content for the business around product/service to support promotional activity

Email - "subscribe to my newsletter", but at enterprise scale and managing content for the millions of subscribers you have

Product marketing - often a function in large enterprises, may be involved with things like messaging within a product

Web - website, seo, design, architecture, UX etc all fall under marketing

There's also a lot of functions that support many of these marketing roles, like the tech that powers all this, keeping things working smoothly, including integrations, compliance with stuff like GDPR, CASL etc