Font Weight

font-weight is similar to font-family in the sense that both are used to alter the appearence of text on a page. font-weight is used to control how heavy our font appears on the page. For example, it usually appears like this text, but increasing the font weight changes the text to look like this.

Example

To increase the heaviness of the text in a paragraph, it might look like this:

h1 {
    font-weight: 20px; 
}

p {
    font-weight: 5px; 
}

If you want to know more about the font-weight property, you can go to the links at MDN Web Docs or w3schools. Both of these sites give excellent examples of the font-weight CSS property that are interactive, and allow you to change and alter the values to see how the property works.