diff --git a/TAGS.md b/TAGS.md
new file mode 100644
index 000000000..468deb6c2
--- /dev/null
+++ b/TAGS.md
@@ -0,0 +1,58 @@
+# Tags
+
+This document aims to provide reasoning why `config.json` contains the `"tags"` it contains.
+
+## Paradigms
+
+- [x] `paradigm/declarative`: implied by `paradigm/functional`.
+- [x] `paradigm/functional`: "purely functional" is Haskell's middle name.
+- [ ] `paradigm/imperative`: even though Haskell is «the world's finest imperative programming language», the style is not prevalent. Unless you count `do`-notation.
+- [ ] `paradigm/logic`: possible through DSL's, but not inherently supported. (Ignoring type class resolution.)
+- [ ] `paradigm/object_oriented`: N/A
+- [ ] `paradigm/procedural`: this would imply `paradigm/imperative`.
+
+## Typing
+
+- [x] `typing/static`: types are checked at compile time.
+- [ ] `typing/dynamic`: types are erased at compile time and hence not available at run time.
+- [x] `typing/strong`: as opposed to this term, types in Haskell are unambiguous.
+- [ ] `typing/weak`: see `typing/strong`.
+
+## Execution mode
+
+- [x] `execution_mode/compiled`: this is the norm.
+- [ ] `execution_mode/interpreted`: while possible (`runghc`), this is not the norm.
+
+## Platform
+
+- [x] `platform/windows`: entirely normal.
+- [x] `platform/mac`: entirely normal.
+- [x] `platform/linux`: entirely normal.
+- [ ] `platform/ios`: unsure whether it has been done, so: no.
+- [ ] `platform/android`: has been done, but is not the norm.
+- [ ] `platform/web`: has been done, but is not the norm.
+
+## Runtime
+
+- [x] `runtime/standalone_executable`: the default.
+- [ ] `runtime/language_specific`: 🤷 (of course it has – but is that notable?)
+- [ ] `runtime/clr`: no support.
+- [ ] `runtime/jvm`: no support.
+- [ ] `runtime/beam`: no support.
+- [ ] `runtime/wasmtime`: no support, but work is being done towards compiling Haskell to Wasm.
+
+## Used for
+
+- [ ] `used_for/artificial_intelligence`:
+- [x] `used_for/backends`:
+- [ ] `used_for/cross_platform_development`:
+- [ ] `used_for/embedded_systems`: the large runtime and the garbage collection make this an ill fit.
+- [x] `used_for/financial_systems`: Haskell is popular with banks and crypto (Cardano) folk.
+- [ ] `used_for/frontends`:
+- [ ] `used_for/games`:
+- [ ] `used_for/guis`:
+- [ ] `used_for/mobile`: too rarely.
+- [ ] `used_for/robotics`:
+- [ ] `used_for/scientific_calculations`: work is being done to make this nice, but it's not there yet.
+- [ ] `used_for/scripts`: very possible, but uncommon.
+- [ ] `used_for/web_development`:
diff --git a/config.json b/config.json
index 79d1f5d14..64e7d4d34 100644
--- a/config.json
+++ b/config.json
@@ -1320,6 +1320,16 @@
     }
   ],
   "tags": [
-    "paradigm/functional"
+    "paradigm/declarative",
+    "paradigm/functional",
+    "typing/static",
+    "typing/strong",
+    "execution_mode/compiled",
+    "platform/windows",
+    "platform/mac",
+    "platform/linux",
+    "runtime/standalone_executable",
+    "used_for/backends",
+    "used_for/financial_systems"
   ]
 }