Serif fonts are easier to read on paper thanks to the serifs on each letter. These lines help the reader connect the letters when they read each word, making the content easier to read. This is why most books are printed with a serif font.
Sans-serif fonts display better on digital screens. This is due to the fact that serifs don’t always display properly on certain screen resolutions. The smaller details can become pixelated, whereas sans-serif fonts are tight and crisp with less potential for details to be distorted.
Unfortunately, not every font is compatible online. The ones that we use are called Web Safe, which means that no matter what, they will be displayed properly on a page. Web Safe fonts have been optimized to display properly on any screen.