Presumably we all have devices with reader mode, be it your web browser, tablet, smartphone or TV in some cases. This is a useful tool when browsing the web which takes a page and reduces the content to plain text (and images with some), making your website compatible should be a priority. Particularly on pages with a lot of text and especially if you have a unique design.
All web developers know or have heard about the importance of meta tags. Most of you are probably already familiar with these and implement them in your site, but it can't hurt to have a handy reference article and downloadable PDF (at the bottom).