Surfing the web with a screen reader or braille display is entirely different from how seeing people experience it. To facilitate their browsing the internet there are things you should be aware of when you write online.
Screen readers read out aloud what's on web pages. They read everything that seeing people see, but perhaps doesn't always think of. If, for instance, you end a sentence with a question mark, the screen reader will end the sentence saying ”question”.
If you write ”what is the problem with people these days?????”, the screen reader will say ”what is the problem with people these days question question question question question.” As you can imagine, this can get very annoying.
So, to make your writing more accessible for blind and other vision impaired people, avoid repeating characters when it isn't necessary.
(Photo by Ryoji Iwata at Unsplash)