Digital marketing happens online, using the internet to advertise products and services through platforms like social media and email.
Two types: Inbound Marketing (organic attraction through tailored ads) and Outbound Marketing (pushing ads without relevance).
Six main types: SEO marketing, SEM, content marketing, email marketing, social media marketing, and e-commerce marketing.
Effective methods include display advertising, email marketing, paid search, content marketing, SEO activities, content optimization, guest blogging, and internal linking.
On-page SEO optimizes website components internally, while off-page SEO involves external actions like link building to increase traffic.