Using profiles

I am just starting to use Profiles. I have added the following code to my web.config file:
        <anonymousIdentification enabled="true"/>
        <profile enabled="true">
            <properties>
                <add name="Name" allowAnonymous="true"/>
                <add name="EmailAddress" allowAnonymous="true"/>
                <add name="Cart" serializeAs="Binary" type="BTP.Commerce.ShoppingCart"
                     allowAnonymous="true"/>
&n ...