She's an important figure behind today's artificial intelligence boom, but not all computer scientists thought Fei-Fei Li was on the right track when she came up with the idea for a giant visual database called ImageNet that took years to build.

We lost Twitter and got X. We tried out Bluesky and Mastodon (well, some of us did). We fretted about AI bots and teen mental health. We cocooned in private chats and scrolled endlessly as we did in years past. For social media users, 2023 was a year of beginnings and endings, with some soul-searching in between.

Here's a look back some of the biggest stories in social media in 2023 — and what to watch for next year:

A U.S. import ban on certain Apple smartwatch models came into effect Tuesday, after the Biden administration opted not to veto a ruling on patent infringements.

The United States International Trade Commission (ITC) decided in October to ban Apple Watch models over a patented technology for detecting blood-oxygen levels.

A quasi-independent review board is recommending that Facebook parent company Meta overturn two decisions it made this fall to remove posts "informing the world about human suffering on both sides" of the Israel-Hamas war.

In both cases, Meta ended up reinstating the posts — one showing Palestinian casualties and the other, an Israeli hostage — on its own, although it added warning screens to both due to violent content. This means the company isn't obligated to do anything about the board's decision.

European Union are looking into whether Elon Musk's online platform X breached tough new social media regulations in the first such investigation since the rules designed to make online content less toxic took effect.

"Today we open formal infringement proceedings against @X" under the Digital Services Act, European Commissioner Thierry Breton said in a post on the platform Monday.

European Union officials worked into the late hours last week hammering out an agreement on world-leading rules meant to govern the use of artificial intelligence in the 27-nation bloc.

The Artificial Intelligence Act is the latest set of regulations designed to govern technology in Europe destined to have global impact.

A Spanish association representing more than 80 newspapers has filed a lawsuit against Facebook parent Meta accusing it of unfair competition in online advertising by allegedly ignoring European Union rules on data protection.

In a statement, the Information Media Association said it is demanding 550 million euros ($600 million) from the social media giant. The association represents dozens of newspapers including Spain's principal dailies El País, El Mundo, ABC and La Vanguardia.

In a high-profile showdown, Rome, Busan and Riyadh are the top contenders to become the host city of the 2030 World Expo as the organizing body prepares to hold a vote in the French capital on Tuesday.

With the stakes high, each city has escalated its campaign efforts, showcasing unique visions and ambitious promises to secure the rights to the globally prestigious event.

Elon Musk, who's been under fire over accusations of antisemitism flourishing on his social media platform X, paid a visit Monday to Israel, where he toured a kibbutz that was attacked last month by Hamas militants and was set to meet with top leaders.

The billionaire and Israeli Prime Minister Benjamin Netanyahu toured the Kfar Azza kibbutz, which was stormed by Hamas militants on Oct. 7. Musk, wearing a protective vest and escorted by a phalanx of security personnel, used his phone to take photos or videos of the devastation, according to video released by Netanyahu's office.

Facebook parent Meta Platforms deliberately engineered its social platforms to hook kids and knew — but never disclosed — it had received millions of complaints about underage users on Instagram but only disabled a fraction of those accounts, according to a newly unsealed legal complaint described in reports from The Wall Street Journal and The New York Times.

The complaint, originally made public in redacted form, was the opening salvo in a lawsuit filed in late October by the attorneys general of 33 states.