Digital marketing can be categorized into the following broad categories:

1. Search Engine Optimization (SEO): This category focuses on improving a website's visibility and ranking on search engine result pages through organic (non-paid) methods.

2. Search Engine Marketing (SEM): SEM involves paid advertising on search engines, such as Google Ads, to increase visibility and drive targeted traffic to a website.

3. Social Media Marketing (SMM): SMM utilizes social media platforms like Facebook, Instagram, and Twitter to promote products or services, engage with the target audience, and build brand awareness.

4. Content Marketing: Content marketing involves creating and distributing valuable and relevant content, such as blog posts, videos, and infographics, to attract and engage the target audience, ultimately driving conversions and building brand loyalty.

5. Email Marketing: Email marketing involves sending targeted promotional messages or newsletters to a specific list of subscribers to nurture leads, drive conversions, and maintain customer relationships.

Other notable categories include influencer marketing, affiliate marketing, online advertising (display ads, video ads), mobile marketing, and marketing automation. These categories may overlap, and businesses often utilize multiple strategies to create comprehensive and effective digital marketing campaigns.