What is the topic and the main idea of the paragraph?

This is inarguably the era of computer and information technology. Everywhere you go, you can see shops offering different types of computers. Flocking these stores are consumers looking for the right laptop. If you are one of those searching for a new laptop, check out these tips in finding the right one for you. First, be clear with your purpose: are you buying it for academic, entertainment, or work­ related reasons? The purpose will also determine the size and specifications that you need, as the performance of the laptop depends on its specifications. Remember that high-end laptops with large screens and advanced systems cost more than mid-range ones, so make sure to factor in your budget when deciding.