Social Bookmarking Sites: An Overview

Social bookmarking sites are online services that allow users to save, organize, manage, and search for bookmarks of web pages. These platforms enable users to store links to interesting content, add tags (keywords) to describe them, and share them with others. This makes it easier to discover new content based on tags or popularity.

Digg: A Social News Aggregator

• Digg was a popular social news website. Users could submit stories (links to articles, videos, etc.) and other users would "digg" (upvote) or "bury" (downvote) them.
• While primarily a social news aggregator, its core function involved users submitting and sharing links, making it fall under the broader category of social media that includes elements of social bookmarking and content discovery.

Delicious: A Classic Social Bookmarking Service

• Delicious (formerly del.icio.us) was one of the earliest and most well-known social bookmarking services.
• It allowed users to save links to web pages, tag them with keywords, and share them publicly or keep them private. It was a clear example of a dedicated social bookmarking platform.

Facebook: A Social Networking Giant

• Facebook is primarily a social networking service. Its main purpose is to connect people, share personal updates, photos, and videos, and facilitate communication among friends and family.
• While users can share links to articles or websites on their feed, this is a feature of social sharing within a network, not its primary function as a dedicated social bookmarking site for saving and organizing web links for later retrieval or public discovery via tags.

Sqidoo (Squidoo): A Content Publishing Platform

• Sqidoo, more commonly known as Squidoo, was a user-generated content publishing platform.
• On Squidoo, users (called "lensmasters") created "lenses" (web pages) on specific topics. These lenses could include text, images, videos, product recommendations, and links to other websites.
• It was designed for content creation and sharing knowledge, rather than for saving and organizing external web links as a primary function. Therefore, Squidoo was a content hub or a publishing platform, not a social bookmarking site.

Identifying the Non-Social Bookmarking Site

Based on the functionalities described:

• Digg provided social bookmarking and news aggregation features.
• Delicious was a quintessential social bookmarking site.
• Facebook is a social networking site with link sharing capabilities but not a dedicated social bookmarking service.
• Sqidoo (Squidoo) was a content publishing platform where users created their own web pages. It did not primarily serve the purpose of saving and organizing external web links.

Therefore, Sqidoo (Squidoo) stands out as the one that is not a social bookmarking site.