Hi Alberta! Generally there will be enough general information in the description of an audit assignment to get some idea of what is involved. Once you accept the job, there will be much more complete details. And generally once you have accepted the job, if you have questions, it is best to contact the scheduler you will be doing the job for or the company if no specific scheduler seems to be involved.
Audits range from jobs most of us would consider more a normal evaluation of the store and service, to counting items in various categories, to identifying every brand and size and price available in a location. They can be revealed or secret. They can require photographs or not. It all depends on the job.