Excodus website is using Google Analytics, Google Maps and October CMS engine.
Google Analytics is a service that generates anonymous statistics about a website's traffic and traffic sources. When you enter the website, Google Analytics sets cookies on your computer in order to rembember you as a returning visitor and check referrer site that directed the you to the page (such as a search engine). You can learn more about Google Analytics here: https://en.wikipedia.org/wiki/Google_Analytics.
Google is also able to place other cookies during your visit on Excodus Website in order to save and load your user preferences. You can get more information about types of cookies set by Google here: https://www.google.com/policies/technologies/types.
Content management system - October CMS - may also set cookies on Excodus Website in order to allow engine's functions (like logging in as a user).
If you do not wish to set cookies on your hard drive you can block them in your browser or simply do not visit this website.
They are small files stored in user's web browser cache. They hold user preferences and unique identifiers which allow to save (and load) activities of website visitor.