Is using a blog software that places articles on your site for an 'article' section as good for the search engines as just uploading the articles yourself? because most blog software do not seem to put in meta keywords or description tags.
Strictly speaking it makes no difference what technology you use to create a page: you could make the best page in the world by hand, or configure CMS software to do the same.
More practically, there's usually a pay-off between control and convenience: CMS software makes adding content much easier, but there are normally sacrifices in terms of the quality of the output, or you have to invest fairly heavily in time in the early stages in order to configure them properly.
There's really no value in adding these any more. I would use the time on improving meta descriptions or having a nice cup of tea instead :)
No matter what kind of the website ,the copywriting is paramount to high traffic and your exposure to visibility. Therefore, you need to place emphasis on how to impoving the quality of web content . The great copywriting is the new and best SEO.
You may find that with some blog software, you will have to install a plugin or make some minor code changes to generate the meta tags that you want. By and large, meta tags aren't gigantic ranking factors - if using a blog or simple CMS lets you get more content and better content on your site, use it!