The internet is one of the most powerful tools out there for information and media sharing, business, and social infrastructure. With how great it is, it can be easy to forget that accessibility is still a very relevant and important thing for web development. The Digital Divide is a term used to represent the problems in accessibility that the internet has and how these problems function. For an in-depth description of what the digital divide actually is, see the link below.
As you can probably guess, this poses a number of problems for many individuals around the world. For example, with many businesses going online, it is becoming harder for those without internet to receive a service that may historically did not exist in the digital realm, such as banking. Thankfully, there are organizations out there working to make the internet a more accessible place, such as Accessibility for Ontarians with Disabilities Act (AODA)
So the question is, what can you as an individual do to make the best use of accessibility? The biggest thing to consider is who your target audience is. For example, if you mean to address an older community, ensure that the text is large enough for them to read and the menus are simple to navigate. Also, try and make all your content available in both PC and mobile format. For a more detailed list of accessibility recommendations, see the link below.