CookieText is a String property that represents the name and value attribute pair, as well as optional parameters that make up the textual representation of the Cookie. CookieText can contain the in the CookieName and Value properties, as well as property values from Expires, Path, Domain, and the Secure flag. 

Use ServerCookie to access the Set-Cookie variant of the Cookie for use in an HTTP response. 

Use ClientCookie to access the values as received on an HTTP Client.

TIdNetscapeCookie.ClientCookie 

TIdNetscapeCookie.ServerCookie 

TIdCookies