Fee tiers in cryptocurrency refer to different fees charged depending on the type of transaction and other factors. The fee tier system is a way for cryptocurrency networks to prioritize transactions based on how quickly they need to be processed. Generally, higher tiers come with higher fees and faster processing times; lower tiers may be cheaper but take longer to process. They can also vary by size or amount of the transaction. For example, larger transactions would typically pay more than smaller ones since they require more resources from the network. 

The fee tier system ensures that users are paying fairly and that their transactions are being processed efficiently. It is an important component of any cryptocurrency ecosystem as it allows for scalability and reliability when it comes to moving value across the blockchain network. 
 

Fee tiers are like different levels in a skyscraper building. Each level has different amenities and services, and you have to pay more to access higher levels. Similarly, in a cryptocurrency exchange, fee tiers are different levels of service that you can choose from, and you have to pay more to access higher levels of service. For example, the basic level might be just allowing you to buy and sell cryptocurrencies, but a higher level could give you access to more advanced trading tools and lower trading fees. Like different levels in a skyscraper building, you can choose the level that best fits your needs and budget.

Maker Fees – This tier is calculated as a percentage of the order size, typically ranging from 0-0.5%. It applies for placing buy and sell orders which are not matched immediately but instead placed on the order book waiting for another trader to take it up. 

Taker Fees – Also known as 'market taker' fees, this tier is also calculated as a percentage of the order size typically ranging from 0-0.5%. It applies for transactions where an order is matched with another trader’s order immediately. 

Transaction Fees – This fee is given to miners in exchange for validating the transaction and adding it to the blockchain ledger. The amount varies based on each cryptocurrency but are usually relatively small fractions of a coin or token.