Sign into your WordPress blog with your WordPress.com account
This “let[s] users login with their WordPress.com Credentials, through WordPress.com Connect” — they’ll be able to log into your WordPress admin safely and securely.
If you enable this on your WordPress.org site, this option will be given to your visitors on your existing log-in form; if they have an account on your site, they’ll be able to log into it via their WordPress.com account (which can be different from your user ID and password that you use to get into your blog).
Click the activate button on the WordPress.com Connect app; you’ll have to “register your website as an application on WordPress.com” to complete the process. To finish activating this feature, click the hyperlink at the top of your Jetpack menu page, or the “configure” button on this particular feature.
Clicking either of these links takes you directly to your general settings. As you may notice, you’ll need a client ID and secret key–visit WordPress.com to do the third step in completing this process.
You already have a WordPress.com account (remember we created one so that we could have Jetpack?), so all that’s needed is for you to register your site. Jetpack/WordPress makes it even easier for you–it should be pre-loaded with your information, taken from your WordPress admin. Unless you need to edit anything, just scroll down to the bottom and click “create” to be taken to your client ID and secret key.
Copy and paste both into the application section on your general setting page. Save changes, and the WordPress.com Connect is activated! Now on your blog’s login page, you’ll see your WordPress.com Connect button.
Be sure to read up on using Jetpack’s many features by checking out the comprehensive overview of the WordPress Jetpack plugin and a summary of ALL of the available features.
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