What does “saturate” mean?
To saturate something is to fill it so completely that it cannot take any more. Add another drop and nothing changes — the capacity is already used up. Every other sense of the word, including the marketing one, is a version of that idea.
The word itself
It comes from the Latin saturare, to fill or to sate — the same root as satisfy and satiate. English borrowed it in the sixteenth century in the sense of glutting or filling to excess, and the technical meanings grew out of that.
The everyday senses
- Soaked through. A saturated sponge or saturated ground holds all the water it physically can; more simply runs off.
- In chemistry. A saturated solution has dissolved as much solute as it will hold at that temperature. Extra crystals sit undissolved at the bottom.
- In chemistry again. A saturated fat is one whose carbon chain holds as many hydrogen atoms as it can — no double bonds left to fill.
- In colour. A saturated colour is at full intensity, with no grey diluting it. This is the sense behind the saturation slider in every photo editor.
- In sound and electronics. A saturated signal has hit the ceiling of what the system can carry, and pushing harder only distorts it.
The common thread across all of them is a ceiling: a point beyond which more input produces no more output.
What market saturation means
In business, a saturated market is one where nearly everyone who wants the product already has it, so growth has to come from replacement or from taking share off a competitor rather than from new demand. UK broadband and smartphones are saturated in this sense.
That is the passive meaning — a description of a market's condition. There is an active one too.
Saturation as a strategy
Saturation marketing borrows the metaphor deliberately: instead of spreading advertising thinly across a whole market, you concentrate it on one clearly defined audience and keep going until that audience is full — until a typical person in it cannot get through a normal week without encountering you.
The ceiling matters here as much as the filling. Saturation has a point of diminishing returns, and a good plan knows roughly where that point sits, because everything spent past it is waste. That is the whole discipline: find the audience you can fill, fill it, and stop before you are just making noise.
Half the market seeing you once is worth far less than five per cent of the market seeing you fifteen times.
Related reading
- What is saturation marketing? — the full method, with the maths.
- Effective frequency — how many exposures it actually takes.
- The saturation calculator — what filling your own audience would cost.