Conversion rate — the percentage of people who engage with a seller (visit a shop, view a product online) who actually complete a purchase — is one of the most useful retail metrics because it shows how effectively interest is being turned into sales, separate from how much traffic or foot-fall exists in the first place. Other common metrics include average transaction value (how much the typical customer spends per visit) and repeat purchase rate (what share of customers return to buy again), both of which point directly to whether upselling, cross-selling, and service quality are working. A career in sales commonly starts in a retail associate or sales assistant role and can progress into team lead, account manager, or dedicated business-to-business (B2B) sales roles, which are frequently paid through a mix of a base salary and commission tied to results — meaning the same core skills taught in this course directly affect long-term earning potential.