Question

how is spelling and grammar checking tool useful...​

Answer 1

Answer:

Because if we made a mistake it'll correct it

FOLLOW ME IF THIS HELPS

Answer 2

Answer:

The checking program would simply break text into sentences, check for any matches in the phrase dictionary, flag suspect phrases and show an alternative. A grammar checker will find each sentence in a text, look up each word in the dictionary, and then attempt to parse the sentence into a form that matches a grammar