If your title is effective and your introduction is engaging you are off to a good start. But keep in mind that when spelling is atrocious and grammar is ignored meaning gets lost. Readers today have little time and patience. When it comes to reading long, poorly constructed posts that wander all around the point without making it – forget it! They have already clicked out.
Good grammar is credibility, especially on the internet. In blog posts, on Facebook statuses, in e-mails, and on company websites, your words are all you have. — I Won’t Hire People Who Use Poor Grammar. Here’s Why.
Do spelling and grammar matter when evaluating content and site quality?
Proofreading and editing are very important blogging skills
All good writing is focused on clarity. Improper use of language leads to miscommunication and can also convey the wrong concept. The better you are at language use, the easier your writing is to read and the less chance there is of misunderstandings occurring.
The best method of proofreading for you will depend on your budget, your timescale, your work, and your own ability. If you are using a cost free tool, it is a good idea to use a wide range of sites. — Proofreading and editing tips
Though they don’t catch every error and do miss homonyms and plural/singular errors, automated spell-checkers do catch most spelling errors.
Automated grammar checkers are not as accurate as proofreading performed by humans but they are becoming better tools so don’t be afraid to use them. — 5 free Grammar Checkers for Bloggers and Writers
shoreacres “Just one addition – grammar and spelling count in comments, too. When I respond to people, I’m as careful as if I were posting a blog entry.
I try to keep a conversational tone, and if someone comes in using the no-caps, slightly abbreviated forms common in texting and so on, I don’t correct them, but I’m very conscious of the value of being equally attentive in comments as in posts.” –The Task at Hand: A Writer’s On-Going Search for Just the Right Word
An excellent resource: The Guide to Grammar and Writing
Related post: Top 5 Informative Writing Tips for Bloggers