If you’re new to Qlik Sense, start with this Discussion Board and get up-to-speed quickly.
How to do Sheet level access security in Qliksense.
Check out this article, It's easy and understandable.
QlikSense Sheet Level Security - QMC Security Rules
Here are some more ressources Sheet level Section Access in Qlik Sense ??
for this type of questions Mayuri, GOOGLE will ALWAYS be your best friend:
Some of the links:
Sheet or App Object Level Security Qlik Sense