Facebook is a global social networking service that allows users to connect with friends, family, and communities through shared content, messaging, and group interactions. Originally launched as a college networking site, it has evolved into a massive ecosystem owned by the technology conglomerate Meta Platforms. For marketers and SEO professionals, Facebook represents one of the largest available data sets for targeted advertising and audience engagement.
Entity Tracking
- Facebook: A worldwide social networking service owned by Meta Platforms.
- Meta Platforms: The American technology conglomerate that owns Facebook, Instagram, WhatsApp, and Oculus.
- News Feed: A central, evolving stream of status updates, photos, videos, and links on a user’s homepage.
- EdgeRank: The algorithm historically used to determine the visibility and order of posts in a user’s News Feed.
- Messenger: A standalone instant messaging application and service used for text, voice, and video communication.
- Marketplace: A platform within Facebook where users buy, sell, and trade items with others in their community.
- Meta AI: An integrated artificial intelligence tool used to generate answers, images, and custom stickers.
- HHVM (HipHop Virtual Machine): An open-source virtual machine developed by Facebook to execute PHP and Hack code efficiently.
- Shadow Profile: A collection of data Facebook maintains about individuals who have not registered for the service.
- Cambridge Analytica: A defunct political data firm at the center of a major 2018 data privacy scandal involving Facebook user data.
What is Facebook?
Facebook is a digital platform designed for social interaction and content sharing. Founded on February 4, 2004, by Mark Zuckerberg and his Harvard roommates, the service was initially restricted to university students but opened to the general public in 2006.
The service operates on a model where users create a profile, "friend" other users, and join groups based on shared interests. It has grown to become the [third-most-visited website in the world] (Similarweb), with a significant portion of its activity occurring on mobile devices.
Why Facebook matters
Marketers use Facebook to reach specific audiences through a combination of organic content and highly granular paid advertising.
- Massive Global Scale: The platform reached [3.04 billion monthly active users as of June 2025] (Facebook Investor Relations).
- Granular Targeting: Advertisers can serve ads based on specific demographics, such as a [woman between 25 and 34 living in Madrid who likes software engineering] (Facebook Data Policy).
- Commercial Capabilities: Marketplace and Buy/Sell groups provide direct avenues for e-commerce and local trading.
- Customer Interaction: Messenger APIs allow businesses to deploy [chatbots and automation for customer service] (Facebook Help Center).
- High Engagement Formats: Features like Reels and Stories allow creators to use trending templates and generative AI to maintain audience attention.
How Facebook works
The Facebook experience centers on the News Feed, which uses algorithms to prioritize content from friends, family, and followed pages. Users interact with the platform through several core components:
- Profiles and Timelines: Users maintain a personal "Timeline" that displays their stories, photos, and life events in chronological order.
- Connections: Users send friend requests that must be accepted by both parties, though they can also "follow" public figures and brand pages.
- Groups: These are communities built around shared hobbies or locations, such as sporting clubs or neighborhood watch groups.
- Messaging: Messenger supports [one-to-one and group video calls with up to 50 people] (The Verge).
- Multi-Media: The platform supports [video uploads up to 240 minutes long and 10 GB in size] (Facebook Business Help).
Technical foundation
To handle its massive traffic, Facebook moved away from standard PHP execution toward more efficient, custom-built environments.
- Hack and HHVM: Facebook developed the [Hack programming language and the HipHop Virtual Machine] (Wired) to improve performance and code reliability.
- Monolithic Architecture: The site is released as a [1.5 GB binary blob distributed via a BitTorrent-based system] (Ars Technica).
- Data Storage: The system uses HBase to process [20 billion events per day] (High Scalability).
- Infrastructure: Static content is served via an internal edge network hosted on the domain fbcdn.net.
Best practices
Success on Facebook requires balancing community engagement with algorithmic requirements.
- Prioritize reels: Use trending templates and the full suite of editing tools to showcase creativity, as the algorithm reflects user interests in video content.
- Leverage groups: Join or create groups to learn from real people and build authority within niche communities.
- Personalize the feed: Encourage followers to interact with posts so the content remains visible in their personalized News Feed.
- Use Generative AI: Create custom stickers and images via Meta AI to delight friends and increase engagement on posts.
- Respond to messages: Utilize Messenger's cross-app messaging with Instagram to manage customer queries across both platforms.
Common mistakes
Mistake: Assuming privacy by default on all posts.
Fix: Explicitly set privacy to "Public," "Friends," or "Only Me" for every update to control who sees the content.
Mistake: Relying on third-party data for ad targeting.
Fix: Focus on first-party data and direct engagement, as Apple’s iOS 14.5 update resulted in [96% of US users opting out of app tracking] (Gizbot).
Mistake: Ignoring specific country age requirements.
Fix: Verify age limits, as the [standard 13-year-old requirement increases to 14 in South Korea, Spain, and Quebec] (Facebook Help).
Mistake: Posting misinformation or fake news.
Fix: Cross-check facts with reputable sources, as Facebook [downranks articles determined to be false by fact-checkers] (The New York Times).
Critical controversies and privacy
Facebook has faced significant global scrutiny regarding its handling of user information and its impact on society.
- Cambridge Analytica Scandal: Information on [over 87 million users was sold to a political data firm] (The Guardian) without their direct knowledge.
- Regulatory Fines: The FTC fined Facebook [$5 billion in 2019 for violating consumer privacy] (Federal Trade Commission), the largest such penalty ever imposed.
- Content Moderation: In 2020, Facebook agreed to pay [$52 million to compensate content moderators] (The Verge) for psychological trauma suffered on the job.
- Platform Security: A major breach in 2018 exposed the [data of 50 million users] (TechCrunch).
FAQ
Who founded Facebook?
The site was founded by Mark Zuckerberg, Eduardo Saverin, Andrew McCollum, Dustin Moskovitz, and Chris Hughes in a Harvard dorm room in 2004.
How does Facebook make money?
Facebook generates revenue primarily through targeted advertising. It uses user data to show relevant ads to specific people and confirmed that it [pledged $1 billion to news publishers] (The Wall Street Journal) to license material for its feed.
What is the "Like" button?
Enabled in February 2009, this feature allows users to interact with posts. In 2016, it was expanded into "Reactions," which include pre-defined emotions like "Love," "Haha," "Wow," "Sad," and "Angry."
Does Facebook own Instagram and WhatsApp?
Yes. Facebook acquired Instagram in 2012 and followed with acquisitions of WhatsApp and Oculus VR in 2014.
What is Internet.org?
Created in 2013, this initiative aims to provide affordable internet access to developing countries, claiming to have [connected almost 100 million people] (TechCrunch) to basic services.
How can I protect my data on Facebook?
Users can adjust privacy settings for individual posts, manage "Off-Facebook Activity" to see what information is collected from other apps, and use two-factor authentication for added security.
