Search engine optimization (SEO) is the process of improving the visibility of a website or a web page in search engines via the "natural" or un-paid ("organic" or "algorithmic") search results. 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

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

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.

LinkedIn is a business-related social networking site. Currently, LinkedIn offers a JavaScript API and a REST API to allow external entities access to its resources. The APIs offer access to people and connections, groups, companies, jobs, social streams, and communications in LinkedIn.

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

Spotify is a music, podcast, and video streaming service that provides digital rights management-protected content from record labels and media companies. wikipedia.org

YouTube is a video-sharing website on which users can upload, view and share videos. wikipedia.org

A data entry clerk, sometimes called a typist, is a member of staff employed to type data into a database using a keyboard. The keyboards used can often have specialist keys and multiple colours to help them in the task and speed up the work. wikipedia.org