What is Power BI? A Complete Beginner’s Guide to Features, DAX & Uses (2026) If you work with data — or you want to — you’ve probably heard the name Power BI at least once. Maybe your manager mentioned it. Maybe you saw it on a job description. Or maybe you’re just curious about what all the fuss is about. Well, you’re in the right place. In this guide, we’re going to cover everything you need to know about Power BI — what it is, what it does, how to install it, how it compares to Excel, and how to write your first DAX formula. Whether you’re a complete beginner or someone who has used Excel for years, this guide is for you. Let’s get started! What is Power BI? Power BI is a business intelligence and data visualization tool developed by Microsoft. In simple words, it helps you take raw data — from Excel files, databases, websites, or apps — and turn it into beautiful, interactive reports and dashboards Instead of staring at boring rows and columns in a spreadsheet, Power BI lets y...
Learning tech skills has become one of the smartest ways to grow your career in 2025. Whether you want a better job, switch careers, or simply stay updated with the industry, online courses can help you learn everything from coding to AI — without spending money. The best part? Many top companies like Google, IBM, Meta, Microsoft , and leading universities now offer free courses with certificates . These certificates can be added to your resume, LinkedIn, or portfolio to boost your chances of getting hired. In this article, I’ve listed the best free online courses to learn tech skills in 2025 . All of them are beginner-friendly, easy to understand, and come with certificates. 1. Google Digital Garage – Free Technology Courses Best for: Beginners, students, job seekers Key Skills: Digital marketing, cybersecurity, data analytics, cloud Certificate: Yes (free) Google Digital Garage offers high-quality courses designed for beginners. The content is simple, practical, and perfect ...