Affiliate marketing is a performance-based marketing strategy where businesses reward affiliates (partners) for driving traffic to their websites or generating sales or leads. In this model, affiliates earn a commission or a predefined reward for each action that results from their marketing efforts. 

Digital marketing encompasses all marketing efforts that use electronic devices or the internet to connect with current and potential customers. It involves leveraging various digital channels and platforms to promote products, services, or brands. Digital marketing strategies are designed to reach and engage target audiences through online channels, allowing businesses to establish and nurture relationships, generate leads, and drive sales.

SEO, or Search Engine Optimization, is a crucial component of digital marketing that focuses on optimizing a website or online content to improve its visibility and ranking in search engine results pages (SERPs). The primary goal of SEO is to increase organic (non-paid) traffic to a website by enhancing its relevance and credibility in the eyes of search engines.