Good great people of nairaland please can anyone in the banking sector help me explain these?

Hello. Thank you for contacting us. If you plan on saving cash for the future on a long term basis, our Fixed/Tenured Deposits offers the best options for you and your business. A Fixed/Tenored Deposit is a tenored investment account with a specific amount invested at an agreed interest rate and tenor. At the end of the agreed period (tenor), and based on your instructions, the investment can either be re-invested or returned to you with the interest amount earned. The tenor is usually 30 days minimum, or 180 days maximum. The minimum amount to start with is N100,000. Our Fixed/Tenured account also gives you access to all our various electronic channels at no extra cost. Please know that the interest rate on our fixed deposit accounts are as follow:
N100,000 - N1MM>>>7 DAYS (0.15%) 30,60,90 & 180 DAYS(4.50%)
N1MM – N10MM>>>>7 DAYS (0.15%) 30,60,90 & 180 DAYS(5.50%)
N10MM – N25MM>>>7 DAYS (0.25%) 30,60,90 & 180 DAYS(6.50%)
N25MM – N50MM>>>7 DAYS (0.25%) 30,60,90 & 180 DAYS(6.75%)
N50MM - N100MM>>>7 DAYS (0.50%) 30,60,90 & 180 DAYS(7.00%)
N100MM>>>>>>>>>>>7 DAYS(0.50%) 30,60,90 & 180 DAYS(8.00%)

Thank you