Assalamualaikum Warahmatullahi Wabarakatuh
It means Peace and mercy and blessings of Allah be upon you.
Words that Muslim over the world used when greet each other. and some muslims say it to every people that they meet. Islam teach to share love with that, cause islam is a religion about piece. Not only when you still alive but also after you leave your life. We believe Allah Swt. is the only one god. In many case we decided to believe it. Let me tell you from our blog how we believe to Allah Swt. and also believe the prophet of Muhammad Saw. is the massanger of Allah Swt.
Wassalamualaikum Warahmatullahi Wabarakatuh
May the peace, mercy, and blessings of Allah be with you
Ramadhan