There is the option of uploading multiple items at once called Bulk upload. You can find it in your account menu. When you get to the Excel file, make sure to fill all the lines correctly.
From the Quick Menu click the button “Bulk upload Draft items” just under the “Items” button. Some advice, from my side: pay attention to the description of each column in the window that appears after and complete the Excel file accordingly. As soon as you will upload the file, all the information will be added to your page.