There are several reasons why you might have extra pages or blank spaces in your Google Doc. This article explains how to remove them, including blank pages, page breaks, and strange formatting.
How to Delete a Page in Google Docs That Cannot Be Deleted
This method is simple and makes the most sense for most situations. Whether the extra page is there because of unnecessary spaces or content you no longer want, removing it involves selecting the unwanted area.
Place the cursor at the end of the sentence preceding the blank or unwanted page. For example, to delete page 2 in a 3-page document, start at the end of page 1 or at the very beginning of page 2.
Click and drag down, somewhat slowly to avoid going too far, stopping at the next sentence you see (if it is a blank page) or just before the next sentence you want to keep. In our example, we stop at the end of page 2 or the beginning of page 3. The idea is to select all of page 2, because we want to delete it.