Remove text from page header image/ destinations page set up

Hi i'm a newbie here and have a few questions. I have tried googling but can't find the right answer to help me. 1. I am setting up a travel blog. The main menu I have created a page that says destinations. Once on the destination page i would like to display a grid of 7 pictures with each one being a page to each contient. Then once in each continent eg Africa i would like to add country pages eg morocco. (im confused as to how to set up pages, catergories, sub items ect ) 2. I have set up a menu the parent page is "explore more" the category i have added under this is "travel inspiration" and "travel tips". when i click on these pages in the header image the word "category" is showing. eg Category: Travel Inspiration. I just want it to say "travel inspiration". How can i remove the word "category" on my header image on each page? https://backpackfullofmaps.com/category/travelinspiration/ Thank you in advance for your help :)