Tier status refers to a classification system used by airlines, hotels and other loyalty programs to determine the level or tier that a member has achieved based on their spending or activity. The tiers are typically divided into different levels such as silver, gold, platinum, diamond etc., with each higher tier offering more benefits than the previous one. Members can earn points or miles for their purchases and activities which determine their tier status within the program. The higher the tier, the greater the rewards and privileges that members can enjoy such as priority check-in, upgrades, free room nights, bonus points etc. Tier status is an important factor in determining a member's loyalty to a particular brand or company, and it helps them to retain their customers by offering attractive benefits and incentives for continued patronage.