There are different types of worship. When someone worships a god, they praise him or her, making offerings and ask for favors, believing that the god will hear their praise, receive their offerings and answer their prayers. Buddhists do not indulge in this kind of worship. The other kind of worship is when we show respect to someone or something we admire.
The perfume of incense reminds us of the pervading influence of virtue, the lamp reminds us of light of knowledge and the flowers which soon fade and die, reminds us of impermanence. When we bow, we express our gratitude to the Buddha for what his teachings have given us. This is the nature of Buddhist worship.
source: