One does not have to be a financial nerd to understand Inflation. It is the increase in the average prices of goods & services in a country. In simple words, a litre of full cream milk in Delhi used to cost Rs 24 in 2009 and, as of now in 2019, it has increased to Rs 53. The cost has more than doubled in the last 10 years. Its not necessary that other goods & services have increased at the same pace. In October 2019, the retail inflation stood at 4.62% vis-a-vis 3.38% in October 2018. Thus, one should regularly review their finances to make sure the real return (post tax) from your savings is either equivalent or more than Inflation otherwise you are losing the purchasing power of Rupee.
(source: OER Commons)