What does letsdo unscrambled mean?

It means to move the letters or Words around in order to create a meaningful form.

For letters, this is the process of anagramming: finding Words within jumbled letters or other Words.

For Words, this is called sentence unscrambling or Word ordering.

e.g. The Word luster has an anagram (reordered form) in the Word result - same letters rearranged.

e.g. The Words "crossed boy street tall the a" forms "a tall boy crossed the street."