To send a Google ping after adding a new post, you can use a search engine optimization (SEO) tool or plugin that automatically pings search engines like Google, Yahoo, and Bing when you update your website. Another option is to manually ping Google using a free online ping service such as Pingomatic.com. Simply enter your website URL and the name of your blog or feed, and the service will notify the search engines of your new post.
To notify Google of a new post, you can submit a sitemap or use the Fetch as Google tool in Google Search Console. A sitemap is a file that lists all the pages on your website and allows search engines to easily crawl and index them. You can submit your sitemap to Google Search Console and it will notify Google of any new posts or changes to your website. The Fetch as Google tool allows you to check if Google can access a specific URL on your website, and also to request that Google crawl that URL, which will help make sure that your new post is included in Google's index.