Example of a link on my page that uses the web+tweet scheme. The “data“ populates new tweet. a href=“web+tweet:Hello%20Treehouse“>Tweet 'Hello Treehouse'< /a Clicking this link would trigger a GET request to: https://mytwitterapp.com/tweet?data=web%2Btweet%3AHello%2520Treehouse

Example explains that registerProtocolHandler allows Alice to do POST on Bob's page. So Alice can e.g. subscribe to Bob just by visiting Bob's page, without remembering details, URLs, etc