Home can be further segmented into kitchen, bath, holiday, patio, etc., and garden into interior, outdoor, landscape, etc., and these segments additionally defined by geographic location, customer demographics and price. Specialty stores, by definition, operate in these narrow market segments, or target markets. A store's intentional focus is its target. Retail markets are also defined by size. Both product demand and population contribute to the overall size of a market.
Market share is that portion of an overall market segment's potential by a specific retailer.
B. A large share of a small market. A small share of a large market. A large share of a large market. Big stores have D pretty much to themselves. Category killers, big boxes, mass merchandisers and department stores don't waste time on small markets.