Yes they do. Often, if the document has an image, they rank highly for image searches too.

Nothing like they used to, at all, in my experience which covers a very wide range of niches).

At one time I used to get some traffic from them (albeit never as much as some others claimed they did).

It gradually tapered off, a few years ago. I don't bother with them any more, now: to me, it doesn't seem worth the effort any more.

I'm always surprised when I see people still recommending them, here. (I strongly suspect that those are people whose "information" comes from out-of-date WSO's and guidebooks, rather than from any real experience.)

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slideshare seems to be the best and the only one I use anymore. It still has plenty of people using the site and it's still driving traffic, even today.

yes they do ..there are many doc share site ..but most of then are good and really drive traffic ..so this good source to get traffic

There are better places for traffic.

Having said that: if you're familiar with the latest techniques and systems (most of which began to be talked about around June / July of 2014) you can do extremely well for buying keywords; though I'd recommend outsourcing the process due to the time consuming nature. Overall, though: I'm not a fan. Like every place where you publish your own content onto a platform that you don't own, it's too easy to get the rug pulled out from under your feet.

Many thanks for your responses. I will still appreciate some more.

Document site submissions used to be a tasty addition to link building/traffic generation though not so much any more in my experience. Dropped off a lot to almost zero. Effort seems better spent in other areas.

I've been on Slideshare and Scribd and Docstoc for the longest....

...they aren't producing anything for me. With Slideshare, initially i was amazed. The amount of *views* that i was getting from them for a brand new presentation would trump my Youtube videos views. So i stopped Youtube altogether and did Slideshare only.

Yeah the numbers looked good in terms of views.. may 200-500 per day to 1 slide.... but 0-1 leads per day into my autoresponder. Maybe you'll have luck with them. I dont use them anymore. I'm streamlining my business now.