Is zksync lite the same as zksync era?

Excuse me, I've been reading up on zksync and I came across the terms "zksync lite" and "zksync era." Could you please clarify if these two are indeed one and the same, or are they distinct entities with different functionalities and purposes within the zksync ecosystem? It would be greatly appreciated if you could elaborate on the differences, if any, and their respective roles in the broader blockchain and cryptocurrency landscape.