First copy the webtuna.js to the root directory for your website
Use FTP, SFTP or your normal upload method to copy the webtuna.js file into the a directory under your site.
This depends on your site and which framework, application or CMS (Content Management System) you are using for your site. Usually there will be a template or master page which contains code which appears on every page on your site.
Code in the <HEAD>
Code before the closing </BODY> tag
Finally verify the code is inserted
To verify that the code has been inserted into your page, load the page in your browser and refresh the page (CTRL-F5) to make sure you have the latest version. Then right-click and choose “View Page Source” and see something like this:
Where to download webtuna.js