Global most trending Google search keywords 2021, by peak search volume

"Squid Game" was the keyword that had the highest maximum monthly search volume in 2021, with 101 million online searches worldwide in its peak month. The second most trending keyword based on its peak search volume was "Christian Eriksen." Eriksen is a Danish football player who experienced cardiac arrest during the Euro 2020 Denmark against Finland match, on June 12, 2021. Another popular keyword search on Google was Queen Elisabeth's late husband "Prince Phillip," with a peak of 37.2 million searches. Another popular topic related to the British royal family was Prince Harry and Meghan Markle's interview with Oprah Winfrey in March 2021. This was the first big interview after the couple decided to step back as senior royals, and queries on the topic went up to 1.2 million searches on Google in 2021.

《鱿鱼游戏》一词在2021年拥有最高的月度搜索量峰值，其最高月度搜索量达到1.01亿次，遍布全球。根据其峰值搜索量，排名第二的热门关键词为“克里斯蒂安·埃里克森”。埃里克森是一位丹麦足球运动员，他在2021年6月12日举行的欧洲杯丹麦对阵芬兰的比赛中遭遇心脏骤停。在谷歌上，另一位备受关注的搜索关键词是已故女王伊丽莎白二世的丈夫“菲利普亲王”，其峰值搜索量达到3720万次。与英国王室相关的另一个热门话题是哈里王子和梅根·马克尔于2021年3月接受奥普拉·温弗瑞的访谈。这是这对夫妇决定退位为高级王室成员后的首次大型访谈，2021年谷歌上的相关搜索量上升至120万次。