Title of Post Not Showing

Which link are you editing? Those %%title%% variables only work for Share URLs, i.e. URLs that point to sharing services such as facebook.com or twitter.com etc. not your site (mysite.com)

Isn’t the idea that you click on it to share on FB or Twitter and it shows up in the box?

I’m not sure I understand your question, what box? Those Share Links are the URLs that the plugin uses to communicate with Facebook or Twitter etc. so they need to point to FB and Twitter.

I know that! What I am saying is, how do you configure it so that when you CLICK on the link to Tweet the article, you get this:

Friends of Pam Tucker – Press Release November 6, 2015 https://www.pam4nh.com/pamtucker/?p=118

Instead of just this:

Friends of Pam Tucker https://www.pam4nh.com/pamtucker/?p=118

Or worse yet this:
https://www.pam4nh.com.com/share?url=%%url%%&text=%%title%%

It says “Specify the default message to use when sharing content, this is what gets replaced into the %%message%% variable”

How to make the actual title of the post show up in the share box?

What you’re referring to is the “Default Message” setting under General Settings: this is a *static* message that is replaced for the %%message%% variable, meaning that whenever you specify %%message%% in the Share Links, then here the plugin will actually put whatever text you specified under “Default Message”.

If you want to modify what appears as text when the user shares something, then you need to edit the Share Link. For instance, let’s take Twitter as an example. This is the default Twitter Share Link:
https://twitter.com/share?url=%%url%%&text=%%message%%

As you can see this will share the url and will use the text of the Default Message. If you want to have the title in the text instead, you replace it with this:
https://twitter.com/share?url=%%url%%&text=%%title%%

There’s an entry in the FAQ for this exact scenario.