Understanding is intrinsic to learning. Having an equal opportunity to learn is a fundamental right of every individual, whether he/she has a disability or irrespective of his/her physical disposition. This is the premise on which the entire online accessibility movement began.
Accessibility in simple terms is a concept that advocates inclusivity and universality in whatever you create. It implies, whether it is a product or a service, everything that you build should be made in such a way that it can be used by everyone, regardless of how they encounter it.
This is especially valuable and relevant when it comes to eLearning or online web content. eLearning accessibility ensures that online learning is delivered by an organization with such care and consideration that even learners with special needs can access it without much hindrance.