INVEST Guidelines is a criteria developed by Bill Wake for Agile software development that evaluates the quality of a user story. It is mnemonic that stands for Independent, Negotiable, Valuable, Estimable, Small and Testable.
An application-oriented question on the topic along with responses can be seen below. The best answer was provided by Chaitanya Shankar Nemani on 23rd Nov 2021.
Applause for all the respondents - Chaitanya Shankar Nemani, Roshini Vijayan, Sandip Mittra, Kiran Kumar R, Parthasarathy Raghava, Prashant Philip Vargis, C V Satish, James Bob Lawless, Manas Mohapatra, Johanan Collins, Rathish Parameshwaran, Pradeep Singh, Praveen Thomas, Mohit Kumar.