Udacity is an online education provider that offers online courses, popularly known as MOOCs or Massive Open Online Courses. As compared to other MOOC providers, Udacity has a stronger focus on job training. Udacity offers a micro-credential called Nanodegree. Sometimes the courses that are part of Nanodegrees are released for free.
Nanodegrees are focused on in-demand skills generally in the field of technology. They consist of video courses as well as projects (some of which are human-graded). Some of these courses and Nanodegrees are produced in partnership with universities and industry experts such as Georgia Tech and Google.
Udacity is the fourth most popular MOOC provider in the world based on the number of students (over 11.5 million learners) and has an active catalog of around 200 online courses.