It's a very common greeting in the Philippines, often used to express hospitality and goodwill. It's a versatile phrase that can be used in many different situations, such as:
* Greeting someone: "Mabuhay!" (Welcome!)
* Expressing joy or celebration: "Mabuhay ang Pilipinas!" (Long live the Philippines!)
* Wishing someone well: "Mabuhay ka!" (May you live long!)
You can also use "Mabuhay" as a way to show appreciation for someone's presence, such as: "Mabuhay ka sa aking tahanan!" (Welcome to my home!).