Go to Admin > Layout, Check the Custom HTML in <head> section of every page and then put the code in the box below and save your settings.
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask 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.