How long does it take for new keywords to be posted?

well, the keywords will be within the code of your website immediately upon publishing to the web... HOWEVER, it depends on the search engine, other factors of your website, etc. and is almost impossible to really know. Google no longer uses keywords (in the meta tags of your code which is where your "keywords" in Yola post to) instead, they just use their smart systems and algorithms to determine the best keywords to use based on your content. They decided to do this because keyword flooding and other tricks were becoming problematic... this solved that! I no longer use keywords in the meta tags of my site and find that I get indexed in Google better. BUT other search engines still use keywords to better determine Search Engine Optimization.