Jetpack is a great plugin for WordPress to connect your blog to WordPress.com. It also gives us dozens of
Jetpack's Mobile module is great plugin to create a mobile version of your website for mobile users, but it comes with a footer credit: Proudly powered by WordPress.
Giving WordPress their credit for their hard work is not bad, but if you're interested then you can easily remove the Jetpack.
In your file manager, edit footer.php file which can be found inside public_html/wp-content/plugins/jetpack/modules/minileven/theme/pub/minileven
Just remove this code from line #27:
<a href="<?php echo esc_url( __( 'http://wordpress.org/', 'jetpack' ) ); ?>" title="<?php esc_attr_e( 'Semantic Personal Publishing Platform', 'minileven' , 'jetpack'); ?>" rel="generator"><?php printf( __( 'Proudly powered by %s', 'minileven' , 'jetpack'), 'WordPress' ); ?></a>
That's it.