added explanation in README.md

README.md

@@ -1,3 +1,49 @@
 # Go Basic Logger
 
 A basic logger written in Go so simple it's impossible to miss it.
+
+## Log levels
+
+| Level    | Alias | Description                                                                         |
+|----------|-------|-------------------------------------------------------------------------------------|
+| DEBUG    | DBG   | Debug information useful when programming                                           |
+| NOTICE   | NOT   | Notice information useful when requesting logs for errors/bugs                      |
+| INFO     | INF   | Standard classic log level, general information that narrates the program execution |
+| WARNING  | WRN   | Warning messages for non-blocking things that go wrong                              |
+| ERROR    | ERR   | Error messages for non-blocking things that go wrong                                |
+| CRITICAL | CRT   | Critical messages it's mandatory to pay attention to, may be still non-blocking     |
+| FATAL    | FAT   | Fatal messages about things for which the program execution cannot continue         |
+
+## Examples
+
+General usage:
+```
+package main
+
+logger Logger
+
+func main() {
+    logLevel := "DEBUG"
+    logger = *new(Logger)
+    logger.Initialize(&logLevel)
+    logger.Debug("Program execution started")
+
+    ...
+
+    if err != nil {
+        logger.Fatal("Received error during operation X:", err)
+    }
+}
+```
+
+Getting the Logger level from an environment variable (called LOGLEVEL, not customizable (yet)):
+```
+...
+
+func main() {
+    logger = *new(Logger)
+    logger.Initialize(nil)
+
+    ...
+}
+```