It will make your life a lot easier
CREATING AND APPLYING MASTER PAGES | Adobe Indesign Tutorial
InDesign, the desktop publishing application included with an Adobe Creative Cloud subscription, is ideal for designing virtually any document, from flyers, posters, and brochures to longer documents such as books, magazines, and eBooks.
Master pages don't really matter if you're designing a single page. However, if the document you're creating with InDesign has multiple pages and you want to keep some elements from each page throughout the document, you'll definitely make things easier by learning how to set up master pages in Adobe InDesign. The whole point is to apply changes to multiple pages of your document.
Master pages control the layout of the entire document. In other words, if you change something on the master page, you will see that change on every page of your document that has the master page applied to it. This is very useful for elements that you want to appear on every page.
