veleno

GCal Events List retrieves events from Google Calendar and shows data in a widget.
To make GCal Events List work properly, you have to activate the plugin and paste your Google Calendar API key and a public calendar ID in the widget admin panel.
It requires some other options. Here is the full list of params:
<ol>
<li>Title (widget title)</li>
<li>Calendar ID (you can find it in the option panel of your Google Calendar)</li>
<li>Google API key</li>
<li>Start from (a valid date in YYYY-MM-DD format)</li>
<li>Max results</li>
</ol>
For a detailed description of calendar settings, read the <a href="https://developers.google.com/google-apps/calendar/" rel="nofollow ugc">Google Calendar Data API documentation</a>
REMEMBER: your Google Calendar must be public, otherwise the widget won’t show any event!

GCal Events List

GCal Events List retrieves future events from a public Google Calendar and shows data in a widget.

topmba

abwebgorohovets

This plugin adds <a href="https://schema.org/Event" rel="nofollow ugc">schema.org’s event markup</a> to All-in-One Event Calendar’s events.
According to <a href="https://developers.google.com/search/docs/guides/intro-structured-data" rel="nofollow ugc">Google</a>, when you provide structured data markup for your online content, you make that content eligible to appear in two categories of Google Search features: 
* Rich results—Structured data for things like recipes, articles, and videos can appear in Rich Cards, as either a single element or a list of items. Other kinds of structured data can enhance the appearance of your site in Search, such as with Breadcrumbs, or a Sitelinks Search Box. 
* Knowledge Graph cards—If you’re the authority for certain content, Google can treat the structured data on your site as factual and import it into the Knowledge Graph, where it can power prominent answers in Search and across Google properties. Knowledge Graph cards appear for authoritative data about organizations, and events. Movie reviews, and movie/music play actions, while based on ranking, can also appear in Knowledge Graph cards once they are reconciled to Knowledge Graph entities.

Ai1ec Rich Snippets

Make your All-in-One Event Calendar events more discoverable in Google (and other) search results by adding rich snippets to them.

GCal Events List vs Ai1ec Rich Snippets