Jetpack is an interesting feature loaded solution by Automattic (the guys who created WordPress) with an idea to to enhance site performance, security, customisation and many other features.

Though, the idea is nothing but great - in most cases (based on our personal experience) Jetpack does slow down the website when using the default settings.

Jetpack settings can be found under Jetpack > Settings ir your wp-admin dashboard:

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It is really strange, but many settings are not visible nor do appear in this dashboard, therefore you will need to take a different route.

Plan B

The URL to a single page showing ALL the Jepack modules, both Active and Deactivated is as follows:

[yoursite.com]/wp-admin/admin.php?page=jetpack_modules

Voila! And now you can Truly manage all the modules (settings) of your Jetpack.

Screenshot: