QoQ

Like YoY used for a year over year, QoQ is used for the quarter over quarter most commonly in the stock market, or to know alternative investment quarterly reports, released at the time when the firms declare their financial results.

It measures the sequential growth or decline in 3 months, as compared to the previous three months.

This is the method used to compare the financial metrics over a given period and it can be used to assess long term trends that are useful in judging the strength of investment in a specific stock or investing solution. 

QoQ metrics involve two consecutive quarters in the financial year and the performance of the specific quarter can be compared against the performance with the immediately preceding quarter. 

Such metrics can be used by the organization to assess short term progress towards a specific goal.

It can produce figures which can be used to modify strategies to perform better in the next financial year.

It can be used to compare the earnings made by firms between quarters. 

Like the ones having seasonal businesses like retail or agriculture, can use the term to track performance over time. 

Companies having a steady growth in their business like IT, green fuel technology or engineering-based firms track data on YoY basis, while, some export/import units or production firms may need to get a month on month, or weekly calculations, as well.