With LeadBI you can create an automation regarding a Lead Score updated, for example about a new lead. Insert the name, the Trigger Lead Score Updated, the lead score value, the maximum number of times this automation can execute for a contact, the conditions (optional) and continue.
You can send a notification to your email, when the user achieves the fixed lead score, that is 100, by clicking on actions.
Then you decide to set up another action, for example to assign tag to the lead.
So, you have set up the automation!