diff --git a/README.md b/README.md
index d2c7e7c0..a92004db 100644
--- a/README.md
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@@ -125,16 +125,19 @@ To set a field when an object already exists:
Tile38 has support to search for objects and points that are within or intersects other objects. All object types can be searched including Polygons, MultiPolygons, GeometryCollections, etc.
+
#### Within
WITHIN searches a collection for objects that are fully contained inside a specified bounding area.
+
#### Intersects
INTERSECTS searches a collection for objects that intersect a specified bounding area.
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#### Nearby
NEARBY searches a collection for objects that intersect a specified radius.