Digital marketing involves promoting a business online through various electronic media like Google ads and social media. Key digital marketing strategies for business growth include search engine optimization (SEO), Google ads, local SEO, and social media marketing. SEO is the process of optimizing websites and content to rank higher in search engine results pages (SERPs) in order to generate more leads and traffic. Important parameters for content marketing include using ranked keywords, minimum character count, keyword density, image size, and keyword proximity.