1. A method for sharing a web feed, the method comprising: receiving at a processor of a computer system a user request to the computer system to view a predefined web feed that is promoted by a web site when browsing the web site, wherein the web site differs from a web feed search engine; at the processor of the computer system, searching at least one web feed repository stored at a memory unit of the computer system for a web feed set that comprises at least one web feed that is related to the web site or to the predefined web feed; and at the processor of the computer system, enabling a subscription to a web feed of the web feed set, wherein the at least one web feed is included in the web feed set if at least one of the following conditions is fulfilled: a URL of the web feed is associated with a URL of a page of the web site wherein the user is not subscribed to the feed associated with the web site; the web feed has a topic that is similar to a topic of the predefined web feed; and the web feed has a topic that is similar to a topic of the web site.