Hi @amandaemonaghan,

I hope you are well today and thank you for your question.

In the browser tab the page title is displayed so to change it you have to either change page title or use some plugin or develop custom code to change only browser title without changing page title.

Please see the information provided on the following pages.

https://searchenginewatch.com/2016/05/16/how-to-write-meta-title-tags-for-seo-with-good-and-bad-examples/

https://developer.wordpress.org/reference/hooks/wp_title/

https://yoast.com/wordpress-seo/#titles

Best regards,
Shufflehound team