In my experience, when I
Google search for corolary, it asks me the following:
Searched the web for corolary .
Did you mean: corollary
The word
corollary links to a search for said word. In
those search results, google returns:
Searched the web for corollary .
-- and the word corollary itself is a link to the
Merriam-Webster dictionary entry for that word. Thus, I don't have to search for multiple spellings to find out which is the correct one, I only need do one search. Google speaks typo.
A bit convoluted to explain, but do it yourself, you'll see what i mean.