Generally, they consist of a simple html file with some markup and some basic CSS. Open the html file in your browser and then do your best to make the output match the `desired-output` screenshot. Most exercises will include a 'self check' section, with a list of items for you to check after you have completed the exercise. Unless listed in the self-check section, do not worry about getting the exact pixel value for things like margin, padding and font-size. These exercises are intended to test your knowledge of CSS, not your ability to guess that a screenshot is using `font: sans-serif bold 16px`.
In many cases, there will be multiple correct ways to solve these problems. The official solution isn't necessarily the _right_ way, but it is possible to do things in ways that are overall unhelpful. If your solution differs wildly from the official solution (and still passes the self-check criteria), feel free to ask about it in the chatroom.
