Computer monitors have many different resolution settings. A laptop computer with a small screen may have a small size, but it is possible for it to run the same resolution as a larger display hooked up to a desktop computer.
Resolution refers to the number of pixels that display on a screen. A standard television has a smaller number of pixels, while an average computer screen has a larger number of pixels.
The technical details are complicated, but the end result is easy to understand. Readers who look at your text may see a wide variety of different sizes when they read your text.
Your text may look very small – even if the reader has a large screen. Ensure you write well and communicate clearly. Use high contrast so it is easy for readers to see text.