I used to enjoy doing them quite a bit before the company I was doing them for got all weird and paranoid. Hopefully you have a different company you are doing them for. There were several types when I was doing them and they were primarily verification that to 'an ordinary person' the business seemed legitimate rather than just a ploy by the unscrupulous to get access to credit records for identity theft or other devious ends. There were photographic criteria to gather to support the legitimacy of the business but there was also the sense of the person with whom you were interacting. I met some delightful local business folks, found myself evaluating a bank and some government offices for legitimacy (talk about a hoot), and encountered a few folks I would never ever want to have access to my credit information.
Then for a while there were 'business evaluations' that were more akin to paying a shopper $50 rather than an appraiser $750 to measure and photograph businesses that were looking for business loans with their real estate as collateral. Those were very time consuming and not particularly welcomed by the companies being measured and photographed.