what's the difference between отличный and отлично? please answer in english

Question

what's the difference between  отличный and отлично? please answer in english

Answer

Hi, the first one is the adjective for masculine form of excellent (in a nominative case).
The second one is the adverb.

Answer

Например:
Отличный день! (Adjective: What an amazing day!) день (какой?) отличный. 
Я отлично провела этот день! (I had a wonderful day.) in this case: отлично is an adverb. Я провела свой день (как?) отлично.