Active Start Date is part of the Retail Customer Activation module. It reveals the first time the customer has appeared in the In-Market Audience. This is the first time we have identified that the customer has searched for information on buying or starting a business.
This is not an indication that they have been searching for your brand or website specifically. However, it does show an interest in business ownership. If a customer does visit your Fran Dev website, they will appear in your Engaged Customer list.