storing, in a database, multiple unique identifiers, wherein each unique identifier is applicable to a different one of at least a product, a provider, or a web page;

listening, after the multiple unique identifiers are stored in the database, for an event on a web browser operated by a first user;

in response to an occurrence of a first event, obtaining, through the web browser a URL or content of a web page that is open on the web browser,

searching, after obtaining the URL or content of the web page, the database for a unique identifier among the multiple unique identifiers that are uniquely associated with a second user, based on the second user belonging to a network of users that is associated with the first user, and based on whether the unique identifier is applicable to the URL or the web page, wherein in the database the unique identifier is tagged with metadata that indicates the URL or the web page, and the unique identifier is extracted from the database based on a search utilizing the metadata; and

presenting the unique identifier to the first user through the web browser.