One way is to ask good content-rich questions + built a community.
Read on:
http://www.question2answer.org/qa/795/how-can-we-make-our-websites-more-popular
http://www.question2answer.org/qa/18636/best-practices-for-starting-a-new-site
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask here, in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.