Paste the snippet
Any theme, any host, any plan.
Your theme's footer.php, or a header/footer plugin
Copy your snippet
In your SiteMind dashboard, open Widget Studio and copy the embed code. It is one script tag with your widget key in it.
Open your theme editor
In your WordPress dashboard, go to Appearance → Theme File Editor. If your host has disabled this (common on managed hosting like WP Engine or Kinsta), install a free plugin instead: "WPCode" or "Insert Headers and Footers" both work well.
Find footer.php
Open your active theme's footer.php file. If you're using a plugin instead, open its settings page and find the field labelled "Footer" or "Scripts in Footer."
Paste the snippet
Paste the snippet on its own line, immediately before the closing </body> tag.
Save
Click Update File (or Save Changes in the plugin). The widget appears on your site immediately, with no cache clearing needed unless you use a page-caching plugin.