Odds are high that you read lots of things off of a very small screen. Look at your phone, check out your e-reader. Tiny, right? Especially when it's compared to that laptop or desktop sitting on your desk, where you probably write the content that you are publishing on the web.
Here's my suggestion: remember this when you are writing your posts for the blog or your articles for the web site. Short sentences are good. Short paragraphs are better.
Headings in bold or italicized fonts help the reader scroll through long content. Hyperlinks should open into a new window, too - helps you keep that reader that might just keep on surfing.
Little things count on the web. Screen size is one of them.