Google Search is adding a notification feature on the mobile app to assist users in learning new words. The feature allows users to sign up to get daily notifications with a new word every day and some of the interesting facts behind it. It is currently available in English only.

source https://gadgets.ndtv.com/apps/news/google-search-update-daily-word-definition-notification-feature-rollout-2584048#rss-gadgets-all