Just how important is spelling and grammar in online content? It is well known that not everybody in the world speaks English as their primary language.
It is also well known that while the first fact is true, the vast majority of all websites... and especially websites about Internet Marketing are written in English.
Not everybody can be an expert in English but you really should consider the importance of spelling and grammar in your online content.
Would you allow an auto repairman to work on your car after he described such technical issues as "fixing the thingy there" or talking to you about "doo-hickers" and "thingamabobs"?
The fact is that if you are going to allow someone to work on your car, you want them to know a carburetor from distributor and you want to know what they are working on and without a bunch of generic talk or worse yet... gobbledy-gook involved in the discussion.
In all likelihood, you would probably leave running and never go back. It may be that they are the greatest mechanic in the world but you would never know that because they could not establish your trust. How many sales pages have you seen where you were almost compelled to buy something that sounded really good but had second thoughts?