We brought in more control over whether you want your wiki pages to be crawled by search engines. Click on Settings -> Robots and you can specify your robots.txt configuration options here.
By default, your public wiki pages will *not* be crawled by search engines. You will have to change the Disallow: /* to Allow: /* for making search engine bots visit your Zoho Wiki. You can become a little more imaginative here and specify which pages need to be crawled and which ones not to be crawled. Refer to this help page for more info about the robots file configuration.