Writing content for a website can be one of the most challenging aspects of website development, but the rewards for writing valuable, quality content can be immense. When searching the web, you'll find that very few web pages can make it to the top position for a given search phrase through search engine optimization alone. Most of the top sites offer content of value, so it's a good segment to focus your efforts.
There are a lot of different variables that factor into developing content of value. You need a compelling topic, good timing, quality research, a solid understanding of your intended audience and much more. But none of these factors will matter if you don't properly edit your writing.
You don't have to be a professional editor in order to edit your own work. Even with minimal editing skills, you can review your written works and fix many common writing mistakes. You don't need to focus on having perfectly written copy at first. Just aim for the low hanging fruit. Make sure that you don't have any typos, make sure that your sentences make sense and make sure that the overall written work conveys the idea you wish to get accross.
These items will all help with your writing's clarity. Writing in a clear manner is vital when it comes to getting your point across to the reader. Again, you don't have to be a professional editor to make these improvements. There is no such thing as a perfectly written work. All you need to do is improve what you've written. People very rarely get it right in their first draft. A simple revision of a first draft will likely clear up 80%-90% of your sentence structure problems.