hello if im submiting my site to web directories is it safe to use the same <meta description> ? or i should use unique description for all
You can use same meta description but its not compulsory to use meta description in directory submission.
Using the meta desc will work, but it doesn't have to be the same. It's easy to just write a quick sentence about the site itself and use that instead as well.
Maintaining a consistent description, IMO is a good idea. You may have multiple descriptions for each page in your site, but in the end each page is going to have ONE description.
You need to follow your website if its indexed on google and other search engines on the first description you did. light change from time to time will refresh it. Mia ( descriptions for each page ) Is the best, but need time and professional webmaster .
You need to submit separate meta tags for each page, to be treated with respect. Try and generate some part of your meta description to be different from others using PHP or such server-side scripting.
Using different description is much better than having the same text all over the place, better for your site and better for the directory itself.