You can install Stackable into your WordPress site in a few ways.
On your WordPress dashboard click Plugins > Add New
Search for "Stackable"
Click the Install Now button, then click Activate
Go to wpstackable.com then click Free Download to download the plugin
On your WordPress dashboard click Plugins > Add New
Click Upload Plugin, and use the Stackable file you downloaded
Once uploaded, click on Activate to activate the plugin
Once Stackable is activated, you should see a new item in your admin menu for Stackable, and you should be redirected to our welcome screen.