If you are stargazing at the equator, your celestial horizon is at right angles to the celestial equator.
The North Star hovers on your northern celestial horizon.
All the stars seem to rise and set at right angles to your celestial horizon, and there are no circumpolar stars.
The reason for this is because the celestial pole itself will on the horizon.
More stars remain continuously above the horizon as you get closer to the celestial pole, and the opposite is true.