My team might abandon me if I said anything but yes to that question! But a better question might be, ‘How much does grammar matter?’ And to that I would say, perhaps heretically to some, ‘Not as much as other things.’ Really?
It’s the Big Picture stuff (deliberate initial caps). It’s the stuff that, on first glance, before you’ve even read a sentence, makes you either run a mile or start reading. It’s a title that tells you what to expect, headings that allow you to skim and get the gist, and a layout that’s clean and open.
And then it’s the language and tone that instantly create a connection — or not.
Way down at the bottom, still on the ‘important things’ list, are grammar, spelling, and proofreading. Of course they matter if we want to be seen as professional and credible. But if you don’t get the other things right, your reader might not even read far enough to notice!
It’s fine and praiseworthy to focus on grammar. Just make sure you don’t miss the forest for the trees.