
There are a few points to take in consideration when you start writing articles (yourselves or somebody you hire to do that) on your site:
- everybody with the internet access will be able to read them, not only your customers, but your friends, your business partners, the reporters and their public... in one word: everybody.
- your site is, in some degrees, the mirror of you (as a person/business) and the products/services you want to sell on the internet. Every good and bad thing on that site will finally reflect to you - it depends to much of the circumstances to start writing about that.
- the communication over the internet is mainly through text, this is probably the reason that the search engines want as much content as they can get from a web page (Google, for instance, changed their searching algorithm to put accent on the unique content). They say that one image worth 1000 words, that image will get you some visitors that will return only if they find good content on your site.
A good optimized web site is the one that is readable in the same way by the humans and the search engines spiders. They all read the content and they judge the site accordingly to that (even the processes are very different). From the search engines spiders the grammar mistakes in the text might create different indexes inside the search engines that you expected when you wrote the content, and the engine will not redirect as many users as you expected.
By the other point of view, it's very difficult for a human to read a text that contains a lot of grammar mistakes... even a torture. Be sure that all of us are making mistakes, but the difference is the promptitude we correct our mistakes and, in time, their number. The first results of reading a bad text is a bad opinion about the site, not only the article, and the visitor might not even read the text to it's end. In worse cases the most common reaction is to never return to the site.
Many people have the tendency to judge quickly if they love or hate a site they see for the first time. The grammar mistakes will always incline that judgement to something bad or worse about the site and it's owner(s) will always lose money (in the virtual world of internet visitors = money).