Outside A/C compressors are typically supported on a concrete pad, concrete blocks, or a vinyl pad such as the one shown in the photo at page top. The air conditioner compressor support pad should be level and secure against movement.
Compressors which are badly out of level may fail to function properly and need adjustment. Tipping and moving compressors can also cause can cause leaks in refrigerant lines, leading to costly air conditioning service calls to evacuate and recharge the system after repairing the refrigerant leak.
Do not try to move your A/C compressor yourself as you might cause a refrigerant leak or may otherwise damage the equipment.
For slightly-tipped air conditioning compressors we generally leave them alone but we add support as needed to avoid further movement.