diff --git a/api/params.go b/api/params.go
index 2427333..14b43f8 100644
--- a/api/params.go
+++ b/api/params.go
@@ -20,7 +20,7 @@ func parseRequiredRequestParams(c *gin.Context, params ...string) (map[string]st
 			c.JSON(400, gin.H{
 				"error": fmt.Sprintf("Please provide '%s' as a querystring parameter", param),
 			})
-			return nil, errors.New(fmt.Sprintf("Failed to parse '%s' querystring parameter", param))
+			return nil, fmt.Errorf("Failed to parse '%s' querystring parameter", param)
 		}
 		if err := validateParam(c, paramValue); err != nil {
 			return nil, err
@@ -54,7 +54,7 @@ func parseExclusiveRequestParams(c *gin.Context, firstParam string, secondParam
 		c.JSON(400, gin.H{
 			"error": fmt.Sprintf("Please provide only one of '%s' or '%s' as a querystring parameter", firstParam, secondParam),
 		})
-		return "", "", errors.New(fmt.Sprintf("Failed to parse '%s, %s' querystring parameters", firstParam, secondParam))
+		return "", "", fmt.Errorf("Failed to parse '%s, %s' querystring parameters", firstParam, secondParam)
 	}
 	if err := validateParam(c, firstParamVal); err != nil {
 		return "", "", err
diff --git a/api/server.go b/api/server.go
index 61aad5e..b87768b 100644
--- a/api/server.go
+++ b/api/server.go
@@ -5,6 +5,7 @@ import (
 	"github.com/gin-gonic/gin"
 )
 
+// Run HTTP server+router for API
 func RunServer(port int) {
 	router := gin.Default()
 
diff --git a/store/gcs_bucket.go b/store/gcs_bucket.go
index 0c8b15b..c38e690 100644
--- a/store/gcs_bucket.go
+++ b/store/gcs_bucket.go
@@ -13,10 +13,12 @@ import (
 )
 
 var (
+	// GCS bucket name
 	BucketName string
 	GoogBucket storage.BucketHandle
 )
 
+// Initialize GCS bucket client
 func InitGoog() {
 	gcsClient, err := storage.NewClient(context.Background())
 	if err != nil {
@@ -26,6 +28,7 @@ func InitGoog() {
 	GoogBucket = *gcsClient.Bucket(BucketName)
 }
 
+// List objects in GCS bucket
 func ListObjects(prefix string, delimiter string, limit int) ([]string, error) {
 	ctxTimeout, cancel := context.WithTimeout(context.Background(), time.Second*30)
 	defer cancel()
@@ -57,6 +60,7 @@ func ListObjects(prefix string, delimiter string, limit int) ([]string, error) {
 	return objects, nil
 }
 
+// Write data to GCS object, will be compressed with zstd
 func WriteObject(object string, data []byte) error {
 	if len(object) == 0 {
 		return errors.New("store.WriteObject: object cannot be empty string")
@@ -85,6 +89,7 @@ func WriteObject(object string, data []byte) error {
 	return nil
 }
 
+// Read data from GCS object, will be automatically decompressed
 func ReadObject(object string) ([]byte, error) {
 	if len(object) == 0 {
 		return nil, errors.New("store.ReadObject: object cannot be empty string")
@@ -112,6 +117,7 @@ func ReadObject(object string) ([]byte, error) {
 	return data, nil
 }
 
+// Delete GCS object
 func DeleteObject(object string) error {
 	if len(object) == 0 {
 		return errors.New("store.DeleteObject: object cannot be empty string")
diff --git a/utils/functions.go b/utils/functions.go
index 22c2601..52e4ebd 100644
--- a/utils/functions.go
+++ b/utils/functions.go
@@ -4,7 +4,7 @@ import (
 	"strings"
 )
 
-// Returns index if found, otherwise -1
+// Linear search, returns first index where found, otherwise -1
 func Search(list []string, a string) int {
 	for i, elem := range list {
 		if elem == a {
@@ -14,6 +14,7 @@ func Search(list []string, a string) int {
 	return -1
 }
 
+// Remove item from slice at index
 func RemoveIndex(list []string, index int) []string {
 	list[index] = list[len(list)-1]
 	list[len(list)-1] = ""
@@ -22,6 +23,7 @@ func RemoveIndex(list []string, index int) []string {
 	return list
 }
 
+// Merge multiple maps into one; duplicate k-v in subsequent maps will override previous ones
 func MergeMaps(maps ...map[string]string) map[string]string {
 	mergedMap := make(map[string]string)
 	for _, innerMap := range maps {
@@ -33,6 +35,7 @@ func MergeMaps(maps ...map[string]string) map[string]string {
 	return mergedMap
 }
 
+// Filter out 'bigbucket' and '/' from tables []string
 func CleanupTables(tables []string) []string {
 	cleanTables := []string{}
 	for _, table := range tables {
diff --git a/utils/server.go b/utils/server.go
index 4a2cc6f..59c7627 100644
--- a/utils/server.go
+++ b/utils/server.go
@@ -13,6 +13,7 @@ import (
 	"github.com/gin-gonic/gin"
 )
 
+// Create and run a new Gin HTTP server with graceful shutdown
 func RunServer(port int, router *gin.Engine) {
 	done := make(chan bool, 1)
 	quit := make(chan os.Signal, 1)
diff --git a/utils/state.go b/utils/state.go
index d44a789..f3f04ee 100644
--- a/utils/state.go
+++ b/utils/state.go
@@ -7,6 +7,7 @@ import (
 	"github.com/adrianchifor/Bigbucket/store"
 )
 
+// Get object content as string[]
 func GetState(object string) []string {
 	state := []string{}
 
@@ -20,6 +21,7 @@ func GetState(object string) []string {
 	return state
 }
 
+// Write string[] to object
 func WriteState(object string, state []string) error {
 	buf := &bytes.Buffer{}
 	gob.NewEncoder(buf).Encode(state)
diff --git a/worker/cleaner.go b/worker/cleaner.go
index b089a85..49ba3ba 100644
--- a/worker/cleaner.go
+++ b/worker/cleaner.go
@@ -22,6 +22,7 @@ var (
 	stopCleanerMutex = &sync.Mutex{}
 )
 
+// Run cleaner once or on an interval
 func RunCleaner(interval int) {
 	done := make(chan bool, 1)
 	quit := make(chan os.Signal, 1)
@@ -57,6 +58,7 @@ func RunCleaner(interval int) {
 	log.Println("Cleaner process done")
 }
 
+// Run cleaner on HTTP POSTs
 func RunCleanerHttp(port int) {
 	deleteJobPool := parallel.LargeJobPool()
 	defer deleteJobPool.Close()