When you want to style several elements in the same way, you can give them a shared class. A class selector in CSS starts with a period (.) followed by the class name. This lets you target any element that has that class attribute. You can use the same class on as many elements as you like, making it easy to apply the same styles to multiple parts of your page. For example, if you add class="highlight" to different elements in your HTML, and then write .highlight { ... } in your CSS, all those elements will share the same style. This approach is flexible and makes your stylesheets more efficient and organized.