For example:
#DisabilityPride is easier to read than #disabilitypride.
#ScreenReadersCanReadThis
#thisisnotscreenreadable

And to totally nail posting here, use camel case in your hashtags! It’s super popular. If you capitalise the first letter of each word, it’s easier for everyone to read and screen readable. #ThisIsEasierToRead #thisisnotscreenreadable