What Is Power BI? Definition, Uses and Examples

Power BI is Microsoft's software for turning raw data (Excel, CSV, databases) into interactive dashboards. It lets you clean data, calculate key figures and present them as charts you can filter in one click. Students and professionals use it to track sales, budgets, headcount or survey results.

Power BI in one definition

Power BI is a business intelligence solution developed by Microsoft. In practice, it is a set of tools that lets you:

• connect to many sources: Excel and CSV files, SQL databases, SharePoint, web pages, online services;

• prepare data: clean, merge and transform it;

• model data by linking several tables together;

• calculate indicators with the DAX language;

• visualise results in interactive reports and dashboards;

• share those reports online, on desktop or on mobile.

What is Power BI used for?

Power BI answers management questions quickly: “Which regions sell the most?”, “How is absenteeism changing?”, “What do my questionnaire responses show?”. Instead of rebuilding Excel tables every month, you build a report once and refresh it in one click when the data changes.

Examples for professionals

• Sales: revenue by month, product and sales rep, target tracking.

• Finance and management control: budget tracking, actual vs. forecast, cash flow.

• Human resources: headcount, hiring, turnover, absenteeism.

• Logistics: stock levels, delivery times, stock-outs.

Examples for students

• Final-year project in a company: deliver a monitoring dashboard to your host company, a concrete deliverable juries appreciate. See our final-year project report example.

• Thesis or dissertation: present questionnaire results with clear, filterable visuals.

• Employability: Power BI is among the skills often requested in data analyst, management control and business analyst job offers. To find a host company, read how to find a final-year internship in Morocco.

How does Power BI work?

A Power BI project almost always follows the same steps:

1. Get data: import an Excel file or connect to a database.

2. Transform with Power Query: remove duplicates, fix column types, merge tables, without changing the source file.

3. Model: link tables (sales, products, customers) in a star schema.

4. Calculate with DAX: create measures such as total sales, share of total or year-over-year change.

5. Visualise: combine charts, maps, KPIs and slicers in a report.

6. Publish and share: publish the report to the Power BI service to view it online or on mobile.

This is exactly the path followed, step by step, in our online Power BI course.

The main Power BI tools

• Power BI Desktop: the free Windows application where you build reports.

• Power BI service: the online platform, in your browser, to publish, share and refresh reports.

• Power BI Mobile: the app to view dashboards on phones and tablets.

• Power Query and DAX: Power BI's two engines, one to prepare data and one to calculate.

Is Power BI free?

Power BI Desktop is a free download and is enough to learn and build reports on your computer. To share reports online with other people, Microsoft generally requires a paid licence (Power BI Pro or Premium capacity). Plans and prices change, so check them on Microsoft's official website before choosing.

Two things to know: Power BI Desktop runs on Windows (there is no native Mac version), and signing in to the online service generally requires a work or school email address.

Power BI or Excel?

Excel remains ideal for entering data, one-off calculations and simple tables. Power BI takes over when data becomes large, comes from several sources or must be tracked over time: reports refresh automatically and stay interactive. The two are complementary, and many users prepare data in Excel before analysing it in Power BI. To master that first step, see our Excel course for data analysis.

Do you need to code to use Power BI?

No. Most tasks are done with the mouse: importing, cleaning, building charts. DAX becomes useful for more advanced calculations, but its formulas look like Excel formulas and can be learned gradually.

Frequently asked questions

What does “BI” stand for in Power BI?

BI stands for Business Intelligence: the methods and tools that turn data into information that supports decisions.

Who uses Power BI?

Companies of all sizes, public bodies and consulting firms, as well as students for their final-year project or thesis. The most concerned profiles are data analysts, management controllers and sales, finance or HR managers.

How long does it take to learn Power BI?

The basics (import, cleaning, first charts) take a few sessions. Data modelling and DAX need more practice. Our programme covers everything in 32 hours, built around a real project.

Does Power BI replace Excel?

No, it complements it. Excel is still useful to prepare and explore data; Power BI is used to model it, track it over time and share it as dashboards.

Going further

Want to build your own dashboards for your final-year project or your job? Our certified Power BI course takes you through 16 two-hour sessions, from Power Query to DAX and publishing, with a final project. For the statistical analysis of your data, see also our statistics course: Excel, SPSS and SmartPLS.