Akismet plugin

You will need to sign up to use Akismet plugin.

Press "Get your API key".  A new window will be pop-up for the signup

Signup in Wordpress.org

Choose the basic version as a start.

You will need to pay a price for the basic subscription

If it is your first sign-up, an email will be sent to the sign-up email address.  Remember to press the "Activate Account" key