What is a Pulse Survey?
An employee pulse survey is a quick and easy survey approach used to determine the levels of satisfaction and engagement among employees. It consists of a short and regular set of questions sent to employees. As the name suggests, pulse surveys are carried out to continuously gain employees’ opinions on job-related roles, interactions and associations, and the overall work environment.

How is a pulse survey different from an annual employee engagement survey?
There are three major differences between pulse surveys and annual employee engagement surveys. Pulse surveys are

Conducted more frequently,
Short,
Follows a continuous sequential approach

Further Reading: https://www.surveysensum.com/customer-experience/pulse-surveys/