Not sure what Rogers is...a small ISP or something so I can't answer that part.
A static IP address is one that does not change and is assigned to you by the ISP. You have to manually enter in the IP information. A dynamic IP is where your computer automatically gets the IP from the ISP via DHCP (Dynamic Host Configuration Protocol) server. It is a leased IP address that is issued to your computer for a given amount of time and eventually expires (in most cases), Then you will get a different after the current IP lease expires.