Ghost powers tens of thousands of independent publications, and every one of those sites has the same problem: adding a small piece of live data — how many people are reading, which countries visit, where people click — usually means installing an integration you'll have to maintain, update and trust.
No integration to configure. Ghost renders raw HTML and script tags from Code injection and from an HTML card, so there is nothing to install and no third party in the loop. Every widget below is one snippet, pasted in once. Pick one and the page tells you the exact menu path for Ghost, the gotchas, and what to do if you're on an older theme or a page builder.