Proxies are fundamental to any developer's programming arsenal. They're a way to access data and information that would otherwise be blocked or unavailable. Even though they can be hard to set up, they're a necessary component to web scraping success. Many problems can be avoided or remedied by understanding proper proxy usage. This is why it's important to learn what to look for and what to avoid when choosing a proxy service. Here are some of the most common issues that come with choosing a particular proxy service, and the ways in which each problem can be avoided.