Playbooks

Z Spot out of Shotgun Bunch Open TE lines up with a bunch of three receivers to the right and a single receiver split left. The single receiver runs a vertical route up the left sideline, while the bunch releases into a classic Spot concept: the outside receiver clears vertically up the numbers, the middle receiver runs a quick corner/flat route, and the inside receiver sits down in the shallow spot area near the sticks. This is a Cover 3 beater built to attack the flat-to-curl seam that zone defenses leave open, with the spot route as the primary read against zone drops and the corner route serving as the man beater against off coverage.
Watch the flat and curl defenders after the snap; if they collapse on the spot route immediately, the corner route behind them is wide open. Cover 3 shells with a single high safety are the primary weakness here since the spot route sits right in the natural seam between underneath zone defenders. Press man coverage on the bunch can disrupt route timing, so look for a jam at the line that delays the corner route release. If the defense shows Cover 4 or two deep safeties, expect the outside linebacker or nickel to carry the vertical route, which opens a bigger throwing lane for the spot underneath. User linebackers sitting deep in a lurk technique can jump the spot route, so counter by looking off the flat before committing to the shallow read.
Pre-snap, identify whether the defense is showing three deep zone or press man on the bunch, since this concept is designed to exploit the flat defender in Cover 3.
Your first read is the spot route sitting in the void; if the flat defender widens with the corner route, throw the spot immediately for an easy chain-mover on third and short.
If you see press man or a Cover 1 look, work the corner route out of the bunch since it clears the underneath defenders and creates natural rub leverage.
Use the outside vertical as a window-clearing route to hold the deep third safety before your eyes come back to the spot and corner combo.
Pair this play with Flood or RPO Zone Alert Bubble in the same set to keep defenses honest, since both force flat defenders to declare before the snap.