SWOT Analysis is a simple tool to understand a situation before you decide what to do. It looks at four areas. Strengths and Weaknesses inside your organisation. Opportunities and Threats outside your organisation. It helps you match what you are good at with what the market needs.
The SWOT idea grew from strategy work in the 1960s. It gives a shared language for teams to discuss reality without blame. The first two boxes are internal. The last two are external. By separating inside from outside you avoid confusing capability with context.
A useful extension is TOWS. It turns insights into four strategy paths. Use Strengths to seize Opportunities. Use Strengths to defend against Threats. Fix Weaknesses to seize Opportunities. Reduce Weaknesses that make Threats worse.
SWOT works because it is fast, visual, and honest. The value comes from the actions you take next. Keep each point short. Use evidence not opinions. Link every item to a decision. Update the SWOT when the context changes. Combine it with PEST or Five Forces to deepen the external view.