Adverbs of manner tell us
how something happens.
They are usually placed either after the main verb or after the object.
He swims well.
He ran quickly.
He plays the flute beautifully.
He ate the cake greedily.
Adverbs of comment provide
an opinion on a situation:
Fortunately, no one was injured.
Honestly, I don't believe a word you say.
It was quite nice, surprisingly.
James, obviously, had no idea.