Serif and sans-serif refer to styles of fonts. A serif is a stylistic embellishment -- or fancy piece -- so serif fonts are fonts that have extra pieces while sans-serif (sans meaning without) are fonts that don't.
To see examples of the difference, you can take a look at the fonts on your computer, Times New Roman (with the tiny lines on the top and bottom of the upper-case "i" so that it doesn't look like an lower-case "L") is a serif font, while Arial is a sans-serif font.
Because the brain reads serif fonts more quickly, most novels are written in serif fonts and textbooks in sans-serif.
The kind of font you see here is a sans serif (sans = without; serif= flourish, embellishment). The white letters on blue background forming the logotype Answers at the top of this page are a serif font, most everything else is sans serif on this page. Time New Roman is a typical and common serif font. Arial is a sans serif font.
Block lettering without the little lines highlighting the termination of the lines that comprise the individual letters. Sans is French language for "without".
Sans Serif: Arial, Geneva, Helvetica, Lucida Sans, Trebuchet and Verdana. Serif: Garamond, Georgia, New York, Bookman Old Style, Times New Roman
No.
sans serif