Cách sử dụng
The word 'tier' is generally used to describe levels or layers of something. For example, a wedding cake may have multiple tiers, or levels, of cake layers. Another example is in sports, where teams are often divided into different tiers based on their skill level or performance. This term can also be used in business to describe a hierarchy or ranking system, where employees or companies are placed in different tiers based on their level of importance or success.