Embroidery
Hooping
Hooping is clamping the garment and backing between an embroidery machine's inner and outer ring so the fabric stays taut and still through every stitch.
Hooping means stretching the garment, along with a stabilizer backing, between the two rings of an embroidery hoop and tightening it so the fabric holds flat and drum-tight under the needle. A shirt or panel that's hooped loosely will shift as the machine stitches, and that shift shows up as registration drift — letters that don't quite line up, or a logo that's noticeably crooked by the time the last color runs.
Hoop size and shape are also what actually limit where a design can go on a garment, more than most buyers realize. A cap needs a specialized cap-frame hoop that curves around the front panels, a sleeve or a pocket only has room for a small hoop, and anything near a side seam, zipper, or set-in sleeve seam has to be positioned so the hoop's rings don't ride up against a seam allowance or a zipper pull. That's the real reason a shop will tell a customer "we can't put that logo exactly there" — it's a hooping constraint, not a lack of will.
Pros hoop with the garment's natural stretch and grain in mind, and they'll reposition or resize a design rather than force a hoop into a spot that fights the fabric, since a strained hoop setup is the single most common cause of puckering after the fact. Cap frames, in particular, take practice to load correctly on curved panels without the fabric bunching.
Buyers sometimes push for placement on a sleeve cuff, a hood, or right along a side seam, not realizing the machine physically can't clamp fabric flat in a tight spot like that. When a shop suggests moving a logo an inch or two, it's almost always a hooping limitation, not an aesthetic opinion.