CSS selectors are handy things. They make coding CSS easier, sure, but they can also help keep your markup clean. For example, here’s a chunk of code that doesn’t use selectors well: <ul class="products"> <li class="product">Item 1</li> <li class="product">Item 2</li> <li class="product">Item 3</li> </ul> This textbook class-itis leads to messy CSS: ul.products { /* Properties here */ } li.product