In order to add a Facebook page widget to the site, we need:
1) Follow this link: https://developers.facebook.com/docs/plugins/page-plugin
In the opened page, it is necessary to enter your URL of the page in Facebook (for example: https://www.facebook.com/solomonotemplate/)
Next, following the prompts and instructions, you configure the appearance of the Facebook window.
After the settings, you need to click "Get code"
In the window that opens, select the "IFrame" tab and copy the code, which we will need to insert later on the site.
2) Now we will place the widget on our site in the left column, below.
To do this, we will go through the "Info pages / Pages / Blocks" and to the right of the name "Banner left 3" click "Update".
In the opened window for editing the article, click "Sourse".
In the opened window, paste the URL of the page in Facebook, which we copied earlier and click "OK".
All we save.
Now we have a Facebook widget.