Social bookmarks are like shared notecards on a topic you are researching and are part of pre-writing. Keep in mind that a good wiki page has good contextual hyperlinks - you need to know ahead of time what these hyperlinks are going to be.
1) The bookmark itself. This is only part and is not enough to consider it "social" bookmarking.
2) Summary (Description) - This is a memory jogger. You should be able to look at this like a notecard and have your diigo library up and able to look at it while writing your wiki and not have to go back to the individual website for more data. If you have to go back then you probably didn't do a good job on notecard - or - you're plaigarizing. The summary should typically have two things -- a summary/ memory jogger/ also notes to the other people reading this bookmark (this is an important part of what we're saying or I like the video on this presentation.) and it should also have a good quote if you want to quote the article.
3) Send it the Group
If you don't send it to the group they don't see it. This is the process of "vetting." If you just used our tags in the general diigo area, we could start getting "spammy" stuff of people promoting their products. We are a learning community studying digital citizenship together and have agreed to work together.
4) Tags - These are labels used to organize topics and help you. Most bookmarks have two kinds of tags.
a) Standard Tags - We agree upon tags for our assigned topics. This helps us share information between each other. I can look for everything tagged with my topic and find other things that my partners in the learning community have found on that topic. This is called taxonomy. Your teacher may also have everything bookmarked by students at your school use the school's official tag just to find them.
b) Personal Tags - I can create personal tags for every topic just to make life easier for me. I could use the tag important or I may see that subtopics are emerging, so for example, I may find a video on sexting but it is part of digital_safety or privacy - I might add sexting as a topic. If enough people use this method then we can see patterns emerge in our topic about what our research is finding. This is called folksonomy. It is meaning that emerges when a lot of "folks" work together.