What Are Proxies Used For?

Every use below comes down to one of a few things a proxy does: give you a different IP, an IP in a chosen location or many IPs at once (uses 1 to 8 and 10), or stand between a network and the internet to filter, cache and log (use 9).

Uses 1 to 8 are what proxy providers sell. Use 9 is infrastructure a company runs itself or buys as a service, and use 10 is the personal use most people have in mind when they first hear the word.

Businesses use proxies in two directions, and most confusion about "what proxies are for" comes from mixing them up (MDN: Proxy servers and tunneling).

ProxyField sells forward proxies. Protecting your own website with a reverse proxy or CDN is a different product.

1. Web scraping and public data collection

A scraper requests thousands of pages; from one IP, the site slows it down or blocks it after a few hundred. Rotating proxies spread the requests over many IPs, ideally IPs from home internet providers, which sites treat as ordinary visitors. This is the largest use of residential proxies. See proxies for web scraping for the setup and the IP types that fit.

2. Price monitoring

Online shops, airlines and hotels can show different prices, stock and delivery options by country, region or even city. A price monitor that checks from one office IP sees one version. With country, region and city targeting, it sees what a shopper in Lyon or Texas sees. More in price monitoring proxies.

3. SEO and SERP tracking

Search results change with the searcher's location. Rank trackers send each query through an IP in the city they report on, so the ranking matches what local searchers get. Without proxies, a tracker run from one place reports one place. See SEO proxies.

4. Ad verification

Advertisers check that their ads appear where they paid for them, next to suitable content, and that the landing page is the real one. Fraudsters often show a clean page to known verification IPs and a different one to real users, so verification has to come from ordinary residential and mobile IPs in the target region. More in ad verification proxies.

5. Brand protection

Brand teams look for counterfeit goods, unauthorized resellers and misuse of their trademarks on marketplaces and websites. Many listings show only to buyers in certain countries, so the search runs through local IPs. The evidence they collect is public: the listing as a buyer sees it.

6. Social media management and monitoring

Agencies and social media managers run their own and their clients' accounts, and analysts monitor public posts and trends by region. Platforms link accounts that share an IP, so each account gets its own sticky IP, kept for the whole session. See social media proxies. Fake accounts and fake engagement are a different thing, and ProxyField's acceptable use policy forbids them.

7. Testing websites, apps, APIs and ads

Before a launch, QA and localization teams check that a site shows the right language, currency, prices, cookie banner and payment methods in each market. A proxy in that market lets a tester in Berlin load the US or Japanese version as a local user would, without travel or a VPN per country. Developers also run a local test proxy, such as Microsoft Dev Proxy, mitmproxy or Charles, between their app and the APIs it calls, to watch the traffic and simulate errors, throttling and slow responses before release.

8. Market research and review monitoring

Product and research teams collect public reviews, ratings and listings to follow sentiment and competitors. Investment firms collect "alternative data", such as job postings, product counts and prices, from public websites. Both are web scraping with a research goal, and both need IPs in the regions they study. See market research proxies.

9. Company networks: filtering, caching and load balancing

Many companies, schools and public Wi-Fi networks send all web traffic through their own forward proxy, today often as part of a secure web gateway:

• Policy: it blocks site categories and known malicious sites under the network's rules.
• Caching: it keeps copies of popular pages and files so they load faster and use less bandwidth.
• Logging: it records who visited what, for security and compliance.
• Configuration: devices get the proxy from a PAC file or from the network itself (automatic proxy setup); when the proxy catches traffic without any setting on the device, it is a transparent proxy.

On the other side of the business, the company's own website usually sits behind a reverse proxy, a load balancer or a CDN, which spreads requests across several servers, caches pages, terminates TLS and absorbs attacks before they reach the servers (Wikipedia: Proxy server).

10. Personal privacy and regional access

People use proxies to keep their home IP away from the sites they visit, or to load a site as a visitor from another country sees it. A proxy changes the IP for one app and does not encrypt traffic by itself, so for privacy on public Wi-Fi a VPN is the better tool; the comparison is in proxy vs VPN. Before you use a proxy to reach a streaming or shopping service from another country, read its terms: many limit it.

• Plain HTTP: the client sends the full URL to the proxy, which fetches the page and returns it.
• HTTPS: the client sends a CONNECT host:443 request and the proxy opens a tunnel; the encrypted traffic passes through without the proxy reading it.
• Headers: some proxies tell the site about themselves with Via, X-Forwarded-For or the standard Forwarded header (MDN). ProxyField's gateway adds none of them, passes the headers your client sends and removes your Proxy-Authorization before the request reaches the site.
• SOCKS5 relays any TCP connection, not only web pages. More on the protocols: what an HTTP proxy is.

The use decides the IP type. A rough guide:

With ProxyField, one balance covers residential and mobile proxies; you choose per-request rotation or a sticky session from 30 s to 36 h (20 minutes by default), and country, region (state) or city targeting.

A proxy changes your IP; it does not make an action legal or allowed. Spam, malware, attacks such as DDoS or password guessing, fraud (including fake accounts, fake engagement, and ad or click fraud) and access to data behind logins you are not entitled to are forbidden under ProxyField's acceptable use policy, and the legal side is in are proxies legal. Free open proxies run by strangers can read or change unencrypted traffic: what to check is in are proxies safe.

Whether you need a proxy at all, and what it costs you in speed and trust, is covered in the advantages and disadvantages of proxy servers.

Need IPs for scraping, price checks or regional testing? ProxyField residential proxies: 412M+ IPs in 195+ countries, city targeting, pay per GB, no subscription. Start with the Easy Trial: 1 GB for $2.95.