understanding VMware Snapshots

When you right click on VM-->Snapshot, there are:

Take snapshot : This will create a delta file to write the changes to.
correct?


Revert to Current Snapshot: this will go to the VM disk state before the first snapshot is taken.
Correct ?

Snapshot Manager: this will open snapshot manage

Consolidate: will this merge all the snapshots created to the base disk ?

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the easy way I see it to delete the snapshots considering the merge or the Non-merge of the snapshots files with the parent disk is to use GO TO then delete whatever is below " you are here"

any VM Expert to clear up the confusion on SNapshots? I have used the VMware link, but they don't explain it case by case...

Thanks