It is not mandatory for every Muslim. For those who can bear the cost of travelling there, staying there and returning home, it is mandatory for them once in their lifetime.
We have 5 pillars of Islam.
- Declaration of faith
- Mandatory 5 times prayer (exception: state of unconsciousness, for females during their monthly cycles and until 40 days after childbirth)
- Fasting in the lunar month of Ramadan (there is also flexibility for some groups of people like sick ones or one who is travelling, they have to make up later)
- Charity or Zakat
- Hajj or pilgrimage to Makka
The last two are not mandatory for every Muslim.
Hope that it answers your question.
