There are three best places to put the MGID widget on your website:
1. Below the Header
2. Sidebar (top)
3. Below the post on every inner page
You can see some illustrations here.
Past experience of bloggers & publishers has shown that these three spots are the best in terms of getting more traffic. Widgets placed in the above-mentioned areas will usually be noticed by a reader; this is getting our system to work to it’s maximum for you!
And keep in mind: never use widget code twice on the same page. It can cause bugs or even failure of the widget. For example: if you already have putted one code at the top of the page, you need to get another widget code for the bottom of this page.