Does anybody have "Focus On Force" or Udemy" Coupons? Looking for study material for "Advanced Admin".

for app builder.. below is advised

Trailmix:

https://trailhead.salesforce.com/en/credentials/platformappbuilder

Guidelines:

https://www.salesforceben.com/platform-app-builder-certification-guide-tips/

https://intellipaat.com/blog/salesforce-app-builder-certification-exam-guide/

Practice questions:

https://focusonforce.com/salesforce-platform-app-builder-certification-practice-quiz-and-sample-questions/

as well as practice exams in webassessor account i suppose