BRUSSELS—The European Union tightened its effort to rein in tech giants like Alphabet Inc.’s Google and Facebook Inc. on Thursday, advancing several measures that aim to shape the way they operate in Europe.
The European Commission—the bloc’s executive body—proposed new EU-wide regulations that would require web platforms, including search engines like Google, to provide more transparency about their search rankings. The rules also aim to prevent web platforms from offering unfair terms to small businesses that use their services...