Every field has its own language, and business is no different. To understand how a company works, you need to grasp a few key terms. These concepts are the foundation for analysing a company's health and performance. They fit together in a simple, logical way.

Everything starts with a fundamental idea called the accounting equation. It's the bedrock of financial reporting and provides a snapshot of a company at a single point in time. The equation states that what a company owns must equal what it owes to others plus what the owners have invested.

Let's break down the first two parts of that equation: assets and liabilities. Think of it like your personal finances. You might own a car and have cash in the bank. Those are your assets. You might also have a car loan and a credit card bill. Those are your liabilities.

Assets are the resources a business uses to operate. This includes tangible things like cash, inventory, buildings, and machinery. It also includes intangible things, like patents or software.

Liabilities are what the company owes to others. This could be a bank loan, money owed to suppliers for materials (called accounts payable), or salaries owed to employees. It's a claim on the company's assets by an outside party.

The final piece of the puzzle is equity. It represents the owners' stake in the company. If you sold all of a company's assets and paid off all its liabilities, the money left over would be the equity. It's the residual interest in the assets after deducting liabilities.

We can rearrange the accounting equation to see this clearly. This shows that equity is simply the difference between what a company owns and what it owes.

Assets, liabilities, and equity give us a snapshot of a company's financial position. But how do we measure its performance over a period, like a month or a year? For that, we need to look at revenue, expenses, and profit.

Revenue is the money a company earns from its business activities. For a coffee shop, it's the money from selling coffee and pastries. For a car manufacturer, it's the money from selling cars. It's often called the 'top line' because it's the first number on an income statement.

Expenses are the costs of doing business. The coffee shop has to pay for beans, milk, rent, and employees. The car maker has costs for steel, labour, and electricity. These are all expenses.

When you subtract all the expenses from all the revenue, the result is profit. If revenue is higher than expenses, the company has a profit. If expenses are higher, it has a loss. This is often called the 'bottom line'.

Profit is a great measure of performance, but it isn't the same as cash. An income statement can show a profit, but the company might still have a cash shortage. That's where our last term comes in.

Cash flow tracks the actual movement of money. A company can make a sale (revenue) but not receive the cash for 30 or 60 days. It can incur an expense but not pay the bill immediately. Cash flow focuses only on the cash coming in and going out, which is vital for a company's day-to-day survival. A business can be profitable on paper but fail if it runs out of cash.

With these basic terms, you have the foundation to understand the financial health and performance of any business.