A system and method for the creation and display of web annotations that are selectively shared within specified online communities is disclosed. An embodiment of the system and method include the use of a web browser plug-in that enables a computer user to create content and have that content associated with an Internet address in the form of a web note that is displayed to the user in a presentation layer over the Internet website. That web note is transmitted to a web server that stores the content and attributes of the web note in a database. When that user or another other user of the browser plug-in subsequently navigates to the aforementioned Internet address, that web note is retrieved from the database and displayed through the browser to the user in a presentation layer over the Internet website, independent of that Internet website based on user determined content sharing filters.