Google Search has all your World Cup 2018 details from scores on each match to breaking news about the event for the duration of its standing, though it's worth pointing out that none of the features are live just yet and won't be available until the World Cup actually starts later this month. That said, with Google Search you'll be equipped to gather any information about the matches, teams, and players you're interested in. In fact, Google in general, across its many tools, is making it possible to get everything you need for the World Cup when it comes to information and content.
While you'll be able to use Search to find scores from matches, the Google News app can be your place to go for anything and everything when it comes to actual news about the games. Google is adding a "World Cup Tracker" to the app to make things easier too, and it'll track things like match highlights and visualize live scores. You'll have to go in and check your favorite teams to optimize it for you personally, but the tool should be quite useful if you plan to keep up on all things World Cup.
Google Assistant can be useful too as you can simply ask Google about a specific match score and it'll be able to read it back to you, which might come in especially handy if you have a Google Home speaker lying around. For all of the tools that Google will be providing to keep you updated, Search may still be the most useful out of all of them. With Search, once the features go live you'll be able to see specific match scores, standings for each team, news, and details about players as well as bracket information. You'll get easy access to video clips and video recaps about thirty minutes after a match ends.