Online platforms is a wide range of activities including online advertising platforms, marketplaces, search engines, social media and creative content outlets, application distribution platforms, communications services, payment systems, and platforms for the collaborative economy.
They share key characteristics including the use of information and communication technologies to facilitate interactions (including commercial transactions) between users, collection and use of data about these interactions, and network effects which make the use of the platforms with most users most valuable to other users. online platforms are strong drivers of digital society and economy. They increase consumer choice, improve efficiency and competitiveness of industry and can enhance civil participation in society. and it is a specially developed platform using internet technology for the design and development of teaching and learning purposes. online platforms have revolutionised access to information and have played a positive role in vitalising markets by better connecting buyers and sellers of services and goods.

Examples are eBay, Craigslist, Amazon Marketplace, Airbnb and Uber.

a platform is a group of technologies that are used as a base upon witch other application,processes or technologies are develop.

in personal computing, aplatform is a basic hardware (computer) and software (operating system) on which software applications can be run. Computers use specific central processing units (CPUs) that are designed to run specific machine language code. In order for the computer to run software applications, the applications must be in that CPU’s binary-coded machine language. Thus, historically, application programs written for one platform would not work on a different platform.