This is a normal function that our server performs that will not adversely affect your computer in any way. We use this ID extensively throughout our Customer- Only pages to verify customer information. It's not like it's a lot of cookies. 2 is normal, heavy browsing of our Customer Only section could perhaps result in perhaps up to 10 cookies in one visit. Accepting cookies is a tradeoff for the convenience of logging in one time for the whole site.
Cookies are a mechanism for browser software to remember something about a web site.
Cookies allow a site to personalize itself for you. For example, in an online shopping mall the web site could use Cookies to list the contents of your virtual shopping cart. In an online news service the web site could use Cookies to list which news categories you are interested in, and which ones you don't want to be bothered with. Also, Cookies enable a site to count individual visitors rather than mere page hits. Our site uses a cookie with a unique session ID that is verified on our 'Customer-Only' section.