How much does it cost to bring in a visitor? Some web traffic is free, but many online stores rely on paid traffic — such as PPC or affiliates — to support and grow their business. Cost of Acquiring Customers (CAC) and Cost Per Acquisition (CPA) are arguably the two most important ecommerce metrics. When balanced with AOV (average order value) and CLV (customer lifetime value), a business can assess and adjust its ad spend as necessary.
Not all web traffic is welcomed. Some companies offer advertising schemes that, in return for increased web traffic (visitors), pay for screen space on the site. There is also "fake traffic", which is bot traffic generated by a third party. This type of traffic can damage a website's reputation, its visibility on Google, and overall domain authority.