The mass transfer tool allows you to transfer up to 250 records at a time from one user to another user while keeping the existing team members intact. You can access this tool from Setup by entering Mass Transfer Records in the Quick Find box. Reference: https://help.salesforce.com/s/articleView?id=sf.mass_transfer_overview.htm&type=5

Validation rule is a tool that can be used to enforce data quality and business logic by preventing users from saving records that do not meet certain criteria. In this case, a validation rule can be created on the Lead object to display an error message if the Lead Status field is marked as qualified and the Budget field is blank. Reference: https://help.salesforce.com/s/articleView?id=sf.fields_about_validation_rules.htm&type=5

Validation rule is a tool that can be used to enforce data quality and business logic by preventing users from saving records that do not meet certain criteria. In this case, a validation rule can be created on the Opportunity object to display an error message if the Stage field is Closed lost and the Loss Reason field is blank. Reference: https://help.salesforce.com/s/articleView?id=sf.fields_about_validation_rules.htm&type=5

Big Deal Alerts are notifications that are sent to users when an opportunity reaches a certain amount, probability, or stage. They can be configured by administrators to alert sales reps or managers when they have a high likelihood of winning a big deal. Key Deals are a feature of Einstein Opportunity Scoring that shows the top opportunities based on their score and stage, but they do not send notifications. Activity Timeline is a component of Lightning Experience that shows the past and upcoming activities related to a record, but it does not notify users of big deals. Performance chart is a type of report chart that shows how well users or teams are performing against their goals, but it does not alert users of big deals. Reference: https://help.salesforce.com/s/articleView?id=sf.forecasts3_big_deal.htm&type=5

Flow Builder supports creating a wizard that can collect user input and perform actions.