The Spell-check panel displays information on the words inserted by you and gives suggestions for the misspelled words. 

If Spell Check Anywhere doesn't have suggestions, you can look up for the word in thesaurus. 

The Spelling-checker Options panel allows you to set Spell Check Anywhere to ignore capitalized words, words with numbers, domain names, catch doubled words or enable auto correct option. 

Spell Check Anywhere gives you the possibility to set hot keys for it, so that you could use it easier.