A keyword in the title tag enables search engines to understand the webpage's subject and differentiate between different pages. Even if two pages on a website have a similar appearance, the search engine can tell them apart thanks to the term in the title tag. Keywords also help your content rank better in SERPs, thereby increasing the chance of getting more visitors. Relevant title keywords are also helpful in getting more clicks on your website in the SERP as people will know what they would get upon visiting the page.