There are people who have a very busy inbox which means that they need to reply to many people on daily basis and they may have some drafts lying in their inbox which they need to complete and reply. In such case they might need to keep an eye on drafts and important starred mails.
Gmail inbox has a smart lab feature which allows you filter and show all drafts and starred mails on the top, in case this is helpful for you, enable this feature under gmail inbox labs feature.
To access gmail labs feature, go to to your gmail account settings and click labs link as shown in the image below.
Now find Multiple Inboxes features by doing a text search by pressing Ctrl+f and check to enable this feature as shown in the image below.
Once you check enable for this feature, scroll down to the bottom of the page and the button Save changes to make this feature come into effect.