Glossary
Market Share
The percentage of total category revenue or customers captured by a given company.
Market share measures how much of a defined market a company holds, usually by revenue but sometimes by customers, usage, or units. It can be calculated globally or sliced by segment, geography, or buyer type. Share movement is a lagging indicator of positioning, product quality, and go-to-market efficiency.
The trap is using share in isolation. A company can lose share while growing revenue (in a faster-growing market) or gain share while shrinking (in a dying one). The more useful questions are relative share (your share versus the #1 player), share of new logos (who is winning the freshest decisions), and share of voice (who shows up in the buyer journey).
Why it matters
Market share frames whether you are a leader, challenger, or niche player — and each role calls for a different strategy and a different competitive posture.
Related terms
Competitive Moat
A durable structural advantage that makes it hard for competitors to erode your market position.
Market Positioning
The place a product occupies in the mind of its target customer relative to alternatives.
Customer Segmentation
Dividing the customer base into groups that share meaningful behaviors, needs, or economics.
Go-to-Market Strategy
The plan for how a company will reach, sell to, and retain its target customers.
Red Ocean Strategy
Competing in an existing, crowded market by outperforming rivals on shared dimensions of value.