diff --git a/include/common.h b/include/common.h
index d303705..3ae97a6 100644
--- a/include/common.h
+++ b/include/common.h
@@ -5,7 +5,7 @@
 #include <stdint.h>
 
 /**
- * A structure used to get curl response
+ * @brief A structure used to get curl response.
  */
 struct memory_buffer {
 	char *data;
@@ -13,43 +13,43 @@ struct memory_buffer {
 };
 
 /**
- * A structure to represent bot object
+ * @brief A structure to represent bot object.
  */
 struct tgbot_t {
-	char token[128]; /**< Bot token */
-	char api[512];	 /**< Bot API url */
-	int32_t offset;	 /**< Bot offset */
-	CURL *curl;		 /**< Curl object, used to send http requests */
+	char token[128]; /**< Bot token. */
+	char api[512];	 /**< Bot API url. */
+	int32_t offset;	 /**< Bot offset. */
+	CURL *curl;		 /**< Curl object, used to send http requests. */
 };
 typedef struct tgbot_t tgbot;
 
 /**
- * A structure to represent Bot information got from getMe API
+ * @brief A structure to represent Bot information got from getMe API.
  */
 struct tgbot_me_t {
-	char first_name[256];
-	char username[32];
+	char first_name[256]; /**< Bot's first name. */
+	char username[32];	  /**< Bot's username. */
 };
 typedef struct tgbot_me_t tgbot_me;
 
 /**
- * A structure to represent Update object
+ * @brief A structure to represent Update object.
  */
 struct tgbot_update_t {
-	int64_t update_id;		   /**< Update id */
-	long message_id;		   /**< Message id */
-	int64_t chat_id;		   /**< Chat id */
-	char chat_first_name[256]; /**< Chat first name */
-	char chat_last_name[256];  /**< Chat last name */
-	char chat_username[32];	   /**< Chat username */
-	char chat_type[32];		   /**< Chat type (private/public) */
-	int32_t date;			   /**< Date in unix timestamp */
-	char text[4096];		   /**< Message text */
+	int64_t update_id;		   /**< Update id. */
+	long message_id;		   /**< Message id. */
+	int64_t chat_id;		   /**< Chat id. */
+	char chat_first_name[256]; /**< Chat first name. */
+	char chat_last_name[256];  /**< Chat last name. */
+	char chat_username[32];	   /**< Chat username. */
+	char chat_type[32];		   /**< Chat type (private/public). */
+	int32_t date;			   /**< Date in unix timestamp. */
+	char text[4096];		   /**< Message text. */
 };
 typedef struct tgbot_update_t tgbot_update;
 
 /**
- * A structure to represent CallbackQuery object
+ * @brief A structure to represent CallbackQuery object.
  */
 struct tgbot_cbquery_t {
 	int64_t update_id;
@@ -59,17 +59,17 @@ struct tgbot_cbquery_t {
 	int32_t date;
 	char text[4096];
 	char chat_instance[128];
-	char data[64]; /**> Callback data */
+	char data[64]; /**> Callback data. */
 };
 typedef struct tgbot_cbquery_t tgbot_cbquery;
 
 /**
- * Callback function pointer
+ * @brief Callback function pointer.
  */
 typedef void (*Callback)(tgbot *bot, tgbot_cbquery *query);
 
 /**
- * A structure to represent error codes
+ * @brief A structure to represent error codes.
  */
 enum tgbot_rc {
 	TGBOT_OK = 0,
diff --git a/include/tgbot.h b/include/tgbot.h
index eb35650..2bcb630 100644
--- a/include/tgbot.h
+++ b/include/tgbot.h
@@ -6,15 +6,19 @@
 #include "types.h"
 
 /**
- * Initializes the Bot object
- * @param[out] bot The Bot object
- * @param[in] token The Bot token (obtained from @BotFather)
+ * @brief Initializes the Bot object.
+ *
+ * @param[out] bot The Bot object.
+ * @param[in] token The Bot token (obtained from @BotFather).
+ *
+ * @return TGBOT_OK on success.
  */
 tgbot_rc tgbot_init(tgbot *bot, char *token);
 
 /**
- * Cleans the memory
- * @param bot The Bot object
+ * @brief Cleans the memory.
+ *
+ * @param[out] bot The Bot object.
  */
 void tgbot_destroy(tgbot *bot);
 
diff --git a/include/types.h b/include/types.h
index fc91020..03081ca 100644
--- a/include/types.h
+++ b/include/types.h
@@ -4,25 +4,65 @@
 #include "common.h"
 
 /**
- * A structure to represent keyboard's buttons
+ * @brief Represents a single button on an inline keyboard.
  */
 struct tgbot_inlinekeyboardbutton_t {
-	char text[200];			/**< If this field is empty the button will be skipped */
-	char url[200];			/**< (Optional) URL of the button */
-	char callback_data[64]; /**< Callback data */
+	char text[200];			/**< Text of the button. If empty, the button is ignored. */
+	char url[200];			/**< (Optional) URL to be opened when the button is pressed. */
+	char callback_data[64]; /**< (Optional) Data sent to the bot when the button is pressed. */
 };
 typedef struct tgbot_inlinekeyboardbutton_t tgbot_inlinekeyboardbutton;
 
+/**
+ * @brief Represents an inline keyboard.
+ */
 struct tgbot_inlinekeyboard_t {
-	size_t rows;
-	size_t columns;
-	struct tgbot_inlinekeyboardbutton_t *buttons;
+	size_t rows;								  /**< Number of rows in the keyboard. */
+	size_t columns;								  /**< Number of columns per row. */
+	struct tgbot_inlinekeyboardbutton_t *buttons; /**< Array of buttons. */
 };
 typedef struct tgbot_inlinekeyboard_t tgbot_inlinekeyboard;
 
+/**
+ * @brief Allocates a new inline keyboard.
+ *
+ * @param[in] rows Number of rows in the keyboard.
+ * @param[in] columns Number of columns in each row.
+ *
+ * @return The pointer to the keyboard or NULL on allocation failure.
+ */
 tgbot_inlinekeyboard *tgbot_new_inlinekeyboard(size_t rows, size_t columns);
+
+/**
+ * @brief Adds or updates a button at the specified position in the keyboard.
+ *
+ * @param[out] keyboard Pointer to the keyboard to modify.
+ * @param[in] row Row index of the button (starting from 0).
+ * @param[in] column Column index of the button (starting from 0).
+ * @param[in] text Display text for the button.
+ * @param[in] url Optional URL for the button.
+ * @param[in] callback_data Optional callback data for the button.
+ *
+ * @return TGBOT_OK on success.
+ */
 tgbot_rc tgbot_inlinekeyboard_button(tgbot_inlinekeyboard *keyboard, size_t row, size_t column, const char *text, const char *url, const char *callback_data);
+
+/**
+ * @brief Returns a pointer to the keyboard's button.
+ *
+ * @param[in] keyboard Keyboard.
+ * @param[in] row Row index of the button.
+ * @param[in] column Column index of the button.
+ *
+ * @return Pointer to the button, or NULL if the position is invalid.
+ */
 tgbot_inlinekeyboardbutton *tgbot_inlinekeyboard_button_at(tgbot_inlinekeyboard *keyboard, size_t row, size_t column);
+
+/**
+ * @brief Frees all memory associated with the given inline keyboard.
+ *
+ * @param[in,out] keyboard Pointer to the keyboard structure to deallocate.
+ */
 void tgbot_destroy_inlinekeyboard(tgbot_inlinekeyboard *keyboard);
 
 #endif