Hand-stitched construction, in everyday language, means you can see thread joining leather to leather — or leather to a midsole — instead of a glued edge that hides the join. On a finished shoe that may appear as a row along the welt, an apron stitch on a loafer, or contrast stitching on a derby quarter.
It is not the same as naming a factory method. Goodyear welting, Blake stitching, and Norwegian welting are specific constructions. YoyooBlue pages only use those names when a product record actually states them. Likewise, “hand-stitched” on this site describes the visible stitched character of the shoes we sell. It does not mean every stitch on every pair was sewn by hand in England.
Why it matters to the wearer: stitching is part of the look. It photographs as craft. It also gives a repairer something to read if the shoe is later resolable — though resoling depends on the actual build of that pair, which you should confirm on the product page.
See the shoes in Hand-Stitched Leather Shoes and the visual explainer The stitching that gives our shoes character.