If you have made any modifications to your Magento store, they will not appear immediately unless you clear the cache.
Magento keeps its cache in /var/cache located inside the Magento installation directory. So, for example, if your Magento is installed in your main public_html folder, the cache will be in public_html/var/cache.
To clear the cache, simply delete everything from the /var/cache directory and then reload your website in your browser.
To clear all sessions, you can also delete everything from the /var/session folder within your Magento installation directory.