Choose Insert, and then More Gadgets.
In the Google Sites Editor, find the Insert menu, and open it. You will see a list of components you can embed on your site, like Tables, Images, and Links. Find the More Gadgets option, and click it. This will let you add editable tools like POWr Countdown Timer to your site.
Copy and Paste
The Gadget manager will appear. Select Add Gadget by URL. Then copy and paste this exact URL into the box. Click on Add to finish.
Adjust Height and Width
Now that you’ve added your new, customizable Countdown Timer Widget to your Google Sites page, you’ll probably want to adjust the size and shape of the Widget. Using the options in the pop-up, pick a height and width for your plugin. You can also choose to add a border, scrollbar, or title around your Countdown Timer Widget, but we don’t recommend it. There is more editing control through the plugin itself.
Set up POWr Countdown Timer
Go to the live Google Sites web page and click the settings gear in the top right corner of your Countdown Timer Widget.
In the POWr Editor, click Import Existing Countdown Timer, find Countdown Timer- and click Copy.