Hi,

Predictive lead scoring is a machine-learning model that uses historical data from Odoo CRM to score open leads/opportunities.

Predictive lead scoring uses some data to predict the probability of winning each new lead or opportunity.

When an opportunity moves to the next stage, its probability of success automatically increases according to the predictive lead scoring algorithm.

To customize the variables used by predictive lead scoring, 

go to CRM ‣ Configuration ‣ Settings. Under Predictive Lead Scoring, click on the Update Probabilities button.

Then, click on the drop-down menu to choose which variables the predictive lead scoring feature will take into account.

The variables Stage and Team are always in effect.

For more details, refer to the blog:

https://www.cybrosys.com/blog/predictive-lead-scoring-and-probability-in-odoo-crm

Hope it helps