The extension profile page describes your extension. Magento Connect forces specific design guides for extensions, which you must follow or risk the extension not being approved. You can obtain the design guideline from http://www.magentocommerce.com/magento-connect/create_your_extension.
Besides design guidelines, a good extension profile should also include other important information that users may need to be aware of to configure the extension, as well as contact information for support questions.
To create an extension profile, perform the following steps:
Log in to http://www.magentocommerce.com.
From the top-right of the page, click on My Account, and then click on your avatar image or username to access your account dashboard.
From the left-side bar, click on Developers to expand its options.