The use of themes makes Drupal exceptionally flexible when it comes to working with the site's interface. Because the functionality of the site is by and large decoupled from the presentation of the site, it is quite easy to chop and change the look, without having to worry about affecting the functionality at all. This is obviously a very useful aspect because it frees you up to experiment however you please knowing that, if worst comes to worst, you can reset the default settings and start from scratch.
You can think of a theme as a template for your site, which you can modify in order to achieve the look and feel you want. Of course, different themes have wildly varying attributes; so it is important to find the theme that most closely resembles what you are looking for in order to reduce the amount of work you need to do.
Accordingly, the first task we need to complete is…