It makes their relationship with God stronger and helps them in their day to day life hope this helps :)
rome
The most common pilgrimage is taken by Muslims; the Hajj, a pilgrimage to Mecca.
israel (jerusalem)
People go on a pilgrimage to Mount Everest because they believe that being the tallest mountain in the world it is closer to their gods.
Very religious people.
Lourdes is a pilgrimage site for our Lady in the south of France. People fast and go without sleep while on pilgrimage in Lough Derg in Ireland. Fatima is a pilgrimage site for our Lady in Portugal. Many people go in the walk for the pilgrimage to Santiago de Compostela in Spain. Vatican City is a place of pilgrimage as it is where the head of the Catholic Church lives.
it depends
hard!
They are called "Pilgrims".
Muslims
a lesser pilgrimage is a pilgrimage that is lesser than the normal pilgrimage
Muslims on the Hajj pilgrimage.