Once you've built your wiki, you'll undoubtedly want to begin attracting contributors. After all, wikis are community projects, so you definitely want to make sure you get others involved whenever you can! Learning the art of promotion is one of the most important things to do as a founder if you want to create a successful community around your wiki.
Why not promote? Wikis are at their best when they are collaborative, community-based projects. Unless you promote your wiki in some way, you will have very few visitors—including both readers and contributors. One or two people can construct a wiki by themselves, but most of a wiki's objectives can often be best achieved with more people. This is especially true when it comes to community building.
To do that, you want to make sure people can find your wiki. You will want to identify places where potential contributors could be attracted and then talk about it there. Founders and the early contributors will likely carry a lot of this weight themselves, but only at first. Once more users start to join the wiki, more people will be able to spread the word and help the wiki grow.
How to promote
Before you even begin promoting your wiki, you want to make sure there is something to promote. It’s not enough to go through the wiki creation process. You need to begin creating the content of the wiki. It's important to get your basic structure, help pages, and forums sorted out, as well as the most content you can. The more and better content you have, the more attractive your wiki will be to search engines.
Once all of that is done, there are any number of ways to promote your wiki. Just remember that there is no single “best way” to promote a wiki, so you should choose whatever seems appropriate to your topic and the community you wish to build. Having said that, here are a few ways you might be able to promote your wiki: