Gathering means controlled fullness created by drawing a longer fabric edge into a shorter one.
Why it matters in practice
Gathering adds softness and volume, but too much bulk or uneven tension can distort a seam.
A useful check before buying
Look for an even distribution, secure stitching and enough ease that the gathered area can move without pulling.
What to keep in mind
When a product description mentions Gathering, return to the garment and verify the claim. Ask what the feature changes for your body, your day and the long-term care of the piece.