Squarespace hosts millions of small-business and portfolio sites, 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 extension you'll have to maintain, update and trust.
No extension. Squarespace renders raw HTML and script tags inside a Code Block, so there is nothing to install from the Extensions marketplace. Every widget below is one snippet, pasted in once. Pick one and the page tells you the exact menu path for Squarespace, the gotchas, and what to do if you're on an older theme or a page builder.