Fonts fall into three main categories: Serif, Sans-serif and Monospace. Serif fonts have a line/stroke at the edges of their characters. They’re more professional and serious. Sans-serif fonts don’t have those edges. They’re more modern, warm and friendly. Monospace fonts have equal-width characters. They’re often used in displaying code.

Serif: Georgia, Times New Roman Sans-serif: Avenir, Arial, Futura, Helvetica, Roboto Monospace: Consolas, Courier, Ubuntu

body {
  margin: 10px;
  /* ctrl + space to check font stack */
  font-family: Georgia, "Times New Roman", Times, serif;
}

p {
  /* 100-900, normal, bold, light... */
  font-weight: normal;
  font-style: italic;
  font-size: 1rem;
  color: #333;
}