Conversion Diagnostics is the discipline of finding out **why conversions are happening—or not happening—after you spend money to drive traffic**. In **Paid Marketing**, it’s the difference between guessing that “the landing page is bad” and proving that a specific device, audience segment, form field, tracking rule, or offer mismatch is suppressing results.
Close Variants are one of the most important (and often misunderstood) mechanics in modern Paid Marketing. In SEM / Paid Search, they determine when your ads can show for search queries that aren’t an exact character-by-character match to your keywords—but are considered meaningfully similar.
Account Hierarchy is the way an organization structures and relates accounts across systems—so teams can manage access, budgets, reporting, and customer relationships consistently. In **Marketing Operations & Data**, it becomes the “organizational backbone” that determines how information rolls up (or drills down) across brands, regions, business units, and customers.
Select_promotion is a practical measurement concept used in **Conversion & Measurement** to capture when a user actively chooses a promotion—such as clicking a homepage banner, tapping an in-app offer tile, or selecting a discount module in a checkout flow. In modern **Analytics**, this is typically implemented as an event that represents *promotion selection* (not just exposure).