In today's Internet era, many industries need to use proxy IPs to better carry out network construction, data collection, and security maintenance. The following are several common industries that need to use proxy IPs:

1. Network security industry: Practitioners in the network security industry often need to use proxy IPs to ensure that their network activities are not tracked by the other party. For example, these people may use proxy IPs to hide their real IP addresses, or conduct anonymous access when conducting network security testing, vulnerability scanning, and other activities.

2. Data collection industry: Many practitioners in the data collection industry also need to use proxy IPs to prevent being blocked or restricted by the target website when crawling data. These people use proxy IPs to change their access IPs to prevent being identified as robots.

3. Advertising and marketing industry: Practitioners in the advertising and marketing industry usually need to collect a large number of IP addresses to establish advertising channels and ensure the accurate positioning and reach of their ads to specific user groups. Using proxy IPs can help these people simulate different geographical locations, device types, network environments, and other factors to better display and promote their products and services.

4. Financial industry: Practitioners in the financial industry often need to use proxy IPs to ensure the security of their transactions and data transmission. Using proxy IP can help them hide their real IP address and network identity, as well as prevent network security threats such as hacker intrusion and malware intrusion.

In short, different industries need to use proxy IP in specific situations. This is a very common and very useful network tool. When using proxy IP, be sure to choose a reliable proxy service provider to ensure your network security and normal business processes.