I have some articles built on article builder which are human readble and 90% unique. Is it ok for them to be used on my site?
It's not possible to answer this without additional information. For example, what are your goals for the site, what type of content you normally post on your site and how do these articles compare to that, etc. It can be said in general that the quality of content is very important for a successful site, but I wouldn't totally rule out article builder articles (especially after some manual modifications) in every situation. Regarding the uniqueness %, it's pretty good already but if you have a Copyscape account, it would be easy to check the duplicate parts and modify those to raise the uniqueness % even higher.
Thanks for the reply, basically I'm trying to make an adsense site where I want to rank highly with quality content, will these articles be good enough?
My guess would be that such content can only give you good rankings if it's a niche with very low competition. And even then it's not easy.
Do you mean articlebuilder.com? I have an account in it and uses the articles. I think the content is good but sometimes the articles are almost the same.
Yes it is OK to use on your site until the content is readable and unique (as you mentioned above 90%). I've Article builder subscription running and mostly i use it to create tier 2/3 backlinks via article marketing and web2.0.
The only place you would want to use these articles is on a site linking back to yours, such as if you are publishing articles for ezinearticles or goarticles. Adsense dictates that your site contain original (not copied or borrowed or spun) content. So that means you'll want to create your own original articles or pay someone to write articles.
If you are using those articles for backlinks then I'm not sure if 90% would work. Getting 100% plagiarism free article is the key if you plan to opt for adsense.