h2 {
/* adds a 1px space horizontally between each letter;
also known as tracking */
letter-spacing: 1px;
}
The letter-spacing property is used to specify the space between the characters in a text.
! letter-spacing also supports negative values:
p {
letter-spacing: -1px;
}
Resources: https://developer.mozilla.org/en-US/docs/Web/CSS/letter-spacing