Most religions have something for you to respect and worship, to feel awesome about it.
The structural purpose of religion is to provide a vehicle through which a society or culture interacts with "the sacred"--a rather nebulous concept, but "sacred" things can be just about anything given a non-mundane significance. Through that interaction, a society experiences a sense of cohesion and fulfilment. Veneration is just a natural consequence of religious respect for an object, idea, or entity.
That's the anthropological perspective.
From the perspectives of religious people themselves, who may or may not understand the social forces behind the construction of their religion, the purpose is to accrue the favour of a divine being. This is rather consistent all throughout the history of religion, from indigenous animism to polytheistic religion to modern monotheism. The difference among religions is what kind of relationship is to be gained through this favour. For most religions in the world, it's contractual; a person gives offerings and says their prayers, and the divine being is expected to reciprocate with supernatural aid or at least averting their wrath. Piety in these religions is ritualistic rather than faith-based. Specific beliefs matter much less than ritual cultivation of worship towards an object or being.
Some religions are mystical; the person interacts with deity in order to sublimate themselves to the sacred, rather than seeking divine aid for some task or situation. In such religions, piety is more about specific beliefs and devotion to a particular object or entity. Most religions of this form--some of which are mystery cults and mystery religions--take the route of ecstatic practices, in which participants dissociate themselves to experience euphoria. However, some rare but influential religions have gone the route of contemplative practices--seclusion in order to isolate oneself from the profane and interact purely with the sacred over a long period of time.
Take Christianity, for example--because people are going to anyway. While large, is actually a rather atypical religion. It is dominantly a religion of faith, with less emphasis on ritual, and a significant place for mysticism in the form of contemplative monasticism. In Christianity, the purpose of worshipping God is to rejoin the divine in Heaven after death; a posthumous sublimation of the self. Most religions in the world, taken on a case-by-case basis, are not like this.