A picture is worth a thousand words, but a typo ruins your image in milliseconds
Spelling and grammar errors are the linguistic equivalent to having spinach in your teeth. Everyone notices them, but rarely anyone lets you know.
Linguistic Assurance involves making sure there are no mistakes, that the text reads clearly and that all links or buttons (depending on the product) function properly.
Additionally, sometimes the text simply does not flow, or the message is not clearly conveyed. It may be that the grammatical structures are OK, but the readability still has issues.
This is where Linguistic Consulting comes in. You need to make sure the instructions are clear, that the whole is coherent and cohesive, and that the information is unblurred.
Emerge from obscurity and let your texts clearly accomplish their mission.