Twitter is about to change everyone's profile to the new format. If you haven't added a big header picture and perhaps a photo for your background, your page — the one that everyone sees when they click over to your profile — will look a bit dull. In fact, your followers could get the impression that you're behind the times — a deadly reputation to earn on the social news site.
Twitter introduced new profiles in September. Only the header or cover photo is new, but judging by the profile pages that have a purple egg for the user's profile photo and the gray background, there are an awful lot of people out there who haven't added their own photos in lieu of Twitter's default images.
A video by Twitter shows you how to add all three photos to your page. While your profile photo itself can be small (this is the one that shows up next to each of your tweets as well as on your profile page), the cover photo should be at least 1,200 pixels wide by 600 pixels high, and the background image should be even bigger — about 1600 by 1200.
If creating this last component feels daunting, there are a number of sites, such as Twitback, that will make it easy by letting you choose from templates. Otherwise, you may create your own background in a program like Photoshop and upload it to Twitter or use the cover photo from your Facebook profile .