The Popover widget JavaScript snippet looks a little something like this:

<script>
  var ps_popover = {
    workspace_id : "8cd78932-ae75-4041-a9df-6184a2e7e58ds",
    selector: "YOUR_SELECTOR"
  };
</script>

As part of this, you will need to specify your HTML selector (highlighted in bold above).

What is a selector?

A selector refers to a CSS class or ID that can be used to identify the element you wish to use to trigger the popover widget.

Let's look at two examples:

1. Class

In this following example:

<div class="popup">What's New</div>

the selector would be .popup - because the HTML element has a class (when referring to classes outside of HTML, they are prefixed with a full-stop/period i.e. .)

2. ID

In this following example:

<div id="popup">What's New</div>

the selector would be #popup - because the HTML element has an ID (when referring to IDs outside of HTML, they are are prefixed with a #)