Linkedin:

Linkedin is the world’s biggest professional network. It is a platform that promotes the need for upgrade and acquisition of skills and certifications to become one of the best in your career field.  This network has helped Business owners to meet professionals who can help them develop their businesses into the dream organization they wanted it to be. Many skilled and unemployed graduates have been able to get jobs through this network. Latest business process technologies also promoted on this platform to sensitize users on best business practices.

LinkedIn is a business- and employment-oriented service that operates via websites and mobile apps. Founded on December 28, 2002, and launched on May 5, 2003, it is mainly used for professional networking, including employers posting jobs and job seekers posting their CVs. As of 2015, most of the company's revenue came from selling access to information about its members to recruiters and sales professionals. As of April 2017, LinkedIn had 500 million members in 200 countries, out of which more than 106 million members are active. LinkedIn allows members (both workers and employers) to create profiles and "connections" to each other in an online social network which may represent real-world professional relationships. Members can invite anyone (whether an existing member or not) to become a connection. The "gated-access approach" (where contact with any professional requires either an existing relationship or an introduction through a contact of theirs) is intended to build trust among the service's members. LinkedIn participated in the EU's International Safe Harbor Privacy Principles.

The site has an Alexa Internet ranking as the 20th most popular website (October 2016). According to the New York Times, US high school students are now creating LinkedIn profiles to include with their college applications. Based in the United States, the site is, as of 2013, available in 24 languages, including Arabic, Chinese, English, French, German, Italian, Portuguese, Spanish, Dutch, Swedish, Danish, Romanian, Russian, Turkish, Japanese, Czech, Polish, Korean, Indonesian, Malay, and Tagalog. LinkedIn filed for an initial public offering in January 2011 and traded its first shares on May 19, 2011, under the NYSE symbol "LNKD".

Google:

Google which started as a small search engine with limited information has developed into one of the most powerful software and the most popular in the world. This software also has a network of users that allow projection of professional and personal profiles for socializing and business partnerships. Students and professionals have greatly benefited from this software. It helps students with unlimited materials to do assignments, thesis and projects. Google also has a map that allows integration of transportation system to make it easy to navigate the world. Google has a number of other softwares like Word press and Blogger that allows Search Engine Optimization and strong online presence.

Google Search Appliance was launched in February 2002, targeted toward providing search technology for larger organizations. Google launched the Mini three years later, which was targeted at smaller organizations. Late in 2006, Google began to sell Custom Search Business Edition, providing customers with an advertising-free window into Google.com's index. The service was renamed Google Site Search in 2008. Site Search customers were notified by email in late March 2017 that no new licenses for Site Search would be sold after April 1, 2017, but that customer and technical support would be provided for the duration of existing license agreements.

Twitter:

Twitter is wonderful software with exceptional features that allows users to post media content and short texts. Videos and pictures and posted on twitter to lead strong campaigns, pass information across different geographical locations and also promote business, products and services. President Trump is known to always react to issues in the United States on Twitter before having press conferences.

Twitter is an online news and social networking service on which users post and interact with messages known as "tweets". Tweets were originally restricted to 140 characters, but on November 7, 2017, this limit was doubled for all languages except Japanese, Korean, and Chinese. Registered users can post tweets, but those who are unregistered can only read them. Users access Twitter through its website interface, through Short Message Service (SMS) or mobile-device application software ("app"). Twitter, Inc. is based in San Francisco, California, and has more than 25 offices around the world.

Twitter was created in March 2006 by Jack Dorsey, Noah Glass, Biz Stone, and Evan Williams and launched in July of that year. The service rapidly gained worldwide popularity. In 2012, more than 100 million users posted 340 million tweets a day, and the service handled an average of 1.6 billion search queries per day. In 2013, it was one of the ten most-visited websites and has been described as "the SMS of the Internet". As of 2016, Twitter had more than 319 million monthly active users. On the day of the 2016 U.S. presidential election, Twitter proved to be the largest source of breaking news, with 40 million election-related tweets sent by 10 p.m. (Eastern Time) that day.

Instagram:

Instagram software is one of the greatest places to sell products and services via picture and video publishing. In this age where there so many obsessions about high quality picture for people and products, Instagram has boarded millions who socialize and sell products and services on the platform through media contents.

Instagram is a photo and video-sharing social networking service owned by Facebook, Inc. It was created by Kevin Systrom and Mike Krieger, and launched in October 2010 exclusively on iOS. A version for Android devices was released two years later, in April 2012, followed by a feature-limited website interface in November 2012, and apps for Windows 10 Mobile and Windows 10 in April 2016 and October 2016 respectively.

The app allows users to upload photos and videos to the service, which can be edited with various filters, and organized with tags and location information. An account's posts can be shared publicly or with pre-approved followers. Users can browse other users' content by tags and locations, and view trending content. Users can "like" photos, and follow other users to add their content to a feed.

Facebook:

Facebook is one of the strongest platform for Digital marketing as users range from individuals, religious organizations, schools, Non-Governmental Organizations, Educational institutions, large organizations, Small and medium Enterprises and small businesses  to Governments. Facebook has a user friendly interface with users ranging from little children to adults. This platform integrated a lot of security systems to frustrate the efforts of cyber criminals who may attempt to hijack the platform and frustrate users.

Facebook is an American online social media and social networking service company based in Menlo Park, California. Its website was launched on February 4, 2004, by Mark Zuckerberg, along with fellow Harvard College students and roommates Eduardo Saverin, Andrew McCollum, Dustin Moskovitz, and Chris Hughes.

Facebook has more than 2.2 billion monthly active users as of January 2018.