Click it and it will expand to show Safari specific options.
Make sure you have a Safari window open and active you will see the 'Safari' menu in the top left of your screen. It can be helpful to clear Safari's stored browsing data sometimes if you're having problems with some websites it provides a bit of a 'clean slate' for you every thing will be reset and you can try again with a fresh browsing setup. Here are instructions to help you clear your browsing history, cookies & cache in Safari on macOS. Clear Cache, Cookies and History on Safari
