Why do we use ctx.data for message variables?

[ghost]

what is the difference between:

.answer(function (ctx) {
  ctx.data.answer = ctx.answer;
  return ctx.sendMessage('OK. I understood. You feel <%=answer%>');
});

and:

.answer(function (ctx) {
  return ctx.sendMessage(`OK. I understood. You feel ${ctx.data}`);
});

?

[SerjoPepper]

In you case it works same. EJS-template need for working with localizations and embedding templates