In typography and lettering, a “sans-serif”, “sans serif”, “gothic”, or simply “sans” letterform is one that does not have extending features called “serifs” at the end of strokes. Sans-serif typefaces tend to have less stroke width variation than serif typefaces. They are often used to convey simplicity and modernity or minimalism.

Font Family in CSS

font-family: -apple-system, BlinkMacSystemFont, "Avenir Next", Avenir,
  "Nimbus Sans L", Roboto, Noto, "Segoe UI", Arial, Helvetica, "Helvetica Neue",