Google Sites offers several themes that you can use to personalize your website. A theme adds color and personality to your website. A theme can make or break your website so think about what your website's about and choose carefully. Hopefully Google will add some more themes later for a better user experience.
Some of the themes offered by Google sites are plain, just colors. These are good if you want more of a professional looking theme for your Website.
There are also other themes that a little better for a personal website. There's one that looks like it would be great for a kid's website, complete with clouds and grass. There's another one that is just sparkles. Look through these Google Sites themes and choose which one you think best represents your website.
