I want to delete unwanted pages from my website top section

Hi, I am a complete noob in terms of web development and was inspired by a video to start blogging so here I am. I created my website last night and in a hurry deleted Ghost posts at once. Now I am left with a bunch of unwanted tabs/buttons/pages on top section of my website (https://sabazblog.ghost.io/ I haven’t got a domain name yet as I want to play around with a bit first). Anyways, I don’t know how to modify or delete these pages. In the pages section of Ghost setting, I can only publish or unpublish pages but unwanted pages are still there. Please help!

I think you’re looking to update the navigation. Here’s a helpful page about that: