This is a short post about word verification a.k.a. 'Captcha' on Blogger (Google) blogs.
The purpose of word verification is to prevent automated spam. You may not even realize you have it, because it doesn't require you to do it when making comments on your own blog. But it will discourage visitors from posting comments, so you should seriously consider turning it off.
If word verification is on, your visitors will see something like this when they post a comment:
After typing their comment, they must decipher and enter the wavy words shown and get them exactly right, caps and all before their comment will be posted. When someone is visiting several sites or posting multiple comments, this gets very old very fast.
From what I've been told, Blogger controls spam fairly well, so this really isn't needed. As an added layer of protection, I restrict anonymous posts to my site. So far, I've not had any problems with spam or inappropriate comments. (5-30-12 Update: I still haven't had trouble, and my settings are the same.)
If you're interested in turning off word verification on your blog, I have two links for you to choose from. One is a blog post with a simple list of instructions. The other (my favorite) is a YouTube video that leads you through the entire process.
*Update 8/15/12: Or you can go to my blog here for instructions and get a Captcha-Free blog button while you're there.
Hope this helps. Happy blogging. = )