What is Facebook and how does it work? 

From connecting people globally to powering sophisticated advertising systems, Facebook has evolved far beyond a simple social network. In this article, MKT Software will break down what Facebook is, how it operates, and why it continues to play a significant role for both regular users and businesses today.

I. What is Facebook?

Facebook is a social networking site, or SNS that allows both individuals and organizations to connect and communicate online. It functions as a digital ecosystem where users can create profiles, build networks, and engage with information through various interactive features. At its core, Facebook operates on a social graph, which is a structured map full of relationships between various users, pages, and content. This graph enables the platform to personalize what each user sees through its algorithm-driven News Feed.

Who owns Facebook?

Facebook is owned by Meta Platforms, Inc., a technology company founded by Mark Zuckerberg. In 2021, Facebook Inc. rebranded to Meta to reflect a broader vision beyond social media, including virtual reality (VR), augmented reality (AR), and the metaverse.  Despite the corporate name change, Facebook remains one of Meta’s flagship platforms alongside Instagram, WhatsApp, and Messenger.

II. The evolution of Facebook

Facebook was launched in 2004 as a university-exclusive network for Harvard students by Mark Zuckerberg and some of his fellow classmates. Over time, it expanded to other universities, then to the general public, rapidly becoming the world’s largest social media platform. The key phases of Facebook’s evolution include:

• 2004–2008 (Foundation Phase): Profile-based networking, friend connections, and basic messaging.
• 2009–2015 (Engagement Expansion): Introduction of the Like button, News Feed optimization, Pages for businesses, and Facebook Ads.
• 2016–2020 (Content & Ecosystem Growth): Expansion into video (Facebook Watch), Groups, Marketplace, and deeper mobile integration.
• 2021–Present (Meta Era): Integration with broader Meta ecosystem, focus on AI-driven recommendations, Reels (short-form video), and metaverse-related developments.

This evolution reflects a shift from a simple networking site to a multi-layered digital platform combining social interaction, content distribution, and advertising infrastructure.

III. Overview of key Facebook features

Facebook’s functionality is built around several interconnected features that serve both users and businesses, such as:

3.1. Profiles

A Facebook Profile represents an individual user’s identity on the platform. Users can add personal information such as name, location, education, and work history, along with profile and cover photos. Profiles allow users to perform actions such as:

• Send and accept friend requests.
• Share posts, photos, videos, and life updates.
• Interact through likes, comments, and shares.

From a system perspective, profiles are key nodes in Facebook’s social graph, helping the platform understand relationships and personalize content delivery.

3.2. News Feed Algorithm

The News Feed is the central interface where users consume content. Rather than displaying posts chronologically, Facebook uses an AI-driven ranking system to curate content. Its primary goal is to maximize engagement by showing content users are most likely to interact with. For businesses, this means content must be highly relevant and engaging to gain visibility.

3.3. Pages

Facebook Pages are designed for businesses, brands, creators, and public figures. Unlike personal profiles, Pages allow organizations to build a scalable and professional presence. Some of Facebook Page’s key functionalities include:

• Publishing content (posts, videos, updates)
• Running advertising campaigns
• Accessing insights and analytics
• Managing customer interactions via comments and messages

Pages also act as conversion hubs, often integrating with websites, shops, and lead generation funnels.

3.4. Groups

Facebook Groups focus on community-driven interaction. They allow users to gather around shared interests, goals, or identities.  Groups can be either Public where it’s open to everyone or Private where access is restricted to only a selected few. They are widely used for:

• Niche communities (e.g., hobbies, industries)
• Brand communities and customer support
• Internal team collaboration

Compared to Pages, Groups typically generate higher engagement because they prioritize conversations over broadcasting.

3.5. Messenger

Facebook Messenger is a standalone messaging platform integrated with Facebook accounts. For businesses, Messenger helps play a key role in areas such as:

• Customer service and support
• Automated chatbots
• Lead qualification and nurturing

Rather than just another personal messaging tool, Messenger has evolved into a customer communication channel for businesses operating on Facebook.

3.6. Facebook Ads

Facebook Ads is one of the platform’s most powerful features and a core revenue driver for Meta. It allows businesses to create highly targeted advertising campaigns where they can segment audiences based on:

• Demographics.
• Interests.
• Behaviors.
• Custom audiences.
• Lookalike audiences.

This level of targeting makes Facebook Ads a highly performance-driven marketing tool, perfect to help brands satisfy their specific advertising goals.

3.7. Facebook Marketplace

Facebook Marketplace is a peer-to-peer commerce feature that allows users to buy and sell products locally. Its most distinctive characteristic lies at its hyperlocal business model where discovery is location-based.

IV. Frequently-asked-question

After defining what Facebook is, and go over the 7 main features of the platform, to have a better understanding of this highly influential platform, below are our answers for some frequently-asked questions about Facebook:

4.1. Is Facebook still relevant today for business owners?

The answer is Yes, Facebook remains highly relevant, however its role has evolved. From a semantic SEO and digital strategy perspective, Facebook is no longer just a social platform, but more of a distribution and targeting engine within a broader marketing ecosystem. However, the way businesses use Facebook has shifted. Organic reach for Pages has declined over the years, meaning that relying solely on unpaid content is no longer as effective as it once was. As a result, paid promotion has become a more essential part of most strategies

4.2. Who are the Subscribers on my Facebook profile?

Subscribers, also known as followers, are people who choose to follow your Facebook public updates without being added as your friends. Instead of forming a mutual connection, they simply opt in to see the content you share publicly. When someone subscribes to a profile, they will only have access to public posts, but not anything that is limited to friends or specific audiences. This allows users to maintain privacy while still reaching a wider audience.

4.3. Can I control what posts I see from people/pages in my News Feed?

The answer is Yes, Facebook gives users several ways to influence and customize what appears in their News Feed, even though the platform relies heavily on algorithmic ranking. You can choose to unfollow people or Pages if you no longer want to see their posts while still remaining connected. On the other hand, you can prioritize certain accounts by marking them as favorites, which increases the likelihood of their content appearing. There is also a temporary “snooze” option that hides posts from specific accounts for a short period.

V. Final thoughts

Facebook is a complex digital infrastructure that connects people, content, and commerce through data-driven systems. Understanding how it works is essential for anyone looking to use it effectively, whether as a user or a business.