In the Acunetix WVS software, what is "1 Target + 3 FREE Network Targets"?

Scan Target refers to any Web site or Web server that can be accessed externally via the Internet (HTTP / HTTPS protocol)

E.g:

'Http://example.com/' - will scan all of this domain name

'Http://example.com/app1- will scan' app1 'and scan the rest of the site

'Http://exmaple.com/app1/' only scan' app1 '

Network targets are similar. You provide the target ID to a network device that can be accessed online and then be able to scan for the network vulnerability it exists.