Added summary

Author: ricardohsmello

java/10_find_project.ipynb

@@ -415,6 +415,18 @@
     "    .projection(projection)\n",
     "    .forEach(book -> System.out.println(\"Book: \" + book.toJson()));"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "8c3f11c5",
+   "metadata": {},
+   "source": [
+    "## Summary\n",
+    "\n",
+    "In this section, we learned how to use `find()` to query documents from a MongoDB collection and apply filters such as `eq()`, `gt()`, `gte()`, and `and()` to narrow down the results.\n",
+    "\n",
+    "We also explored projections with `include()`, `excludeId()`, and `fields()` to control which fields are returned, helping us retrieve only the data we actually need."
+   ]
   }
  ],
  "metadata": {