One reason is that employers want to check how well you can talk and explain things. Communication is really important in most jobs, but you can't really see that just by looking at someone's resume. In an interview, you have to answer questions and talk about yourself, so it's a good way for them to see if you can communicate clearly.
一個原因是雇主想要確認你說話和解釋事情的能力。溝通在大多數工作中都非常重要,但僅憑看某人的履歷是看不出來的。在面試中,你必須回答問題並談論自己,這對他們來說是檢視你是否能清楚溝通的好方法。