JavaScript can be used everywhere including web clients and applications. It is easy to start with JavaScript as there are many plug-and-play solutions available and you don't need to be a programmer. JavaScript is also easy to learn as the code is uncompiled and can be viewed directly, and there are many online resources and books available. The basic concepts of JavaScript like objects and conditionals are standard. To get started with JavaScript, all you need is a browser and text editor. Some gotchas to be aware of include differences across browsers, outdated examples, and reinventing solutions that frameworks provide.