Social media marketing refers to the process of gaining traffic or attention through social media sites. wikipedia.org

Twitter is an online social networking service and microblogging service that enables its users to send and read text-based messages of up to 140 characters, known as tweets.

Internet marketing, also known as web marketing, online marketing, or e-marketing, is referred to as the marketing (generally promotion) of products or services over the Internet. iMarketing is used as an abbreviated form for Internet Marketing. wikipedia.org

Digital marketing is an umbrella term for the marketing of products or services using digital technologies, mainly on the Internet, but also including mobile phones, display advertising, and any other digital medium. wikipedia.org

Content strategy refers to the planning, development, and management of content, written or in other media. wikipedia.org

Lead generation, or lead gen is a marketing tool used, particularly in internet marketing, to generate consumer interest or inquiry into products or services of a business. wikipedia.org