what are multicultural festivals? what is their purpose?

Greetings,
In America and places in Europe where there are residents from several
different countries (immigrants, or longer term temporary foreign
workers), "multiculti" festivals are often arranged by towns to
recognize these cultures within the community.
For one or two days in a park or city square, the different national
groups will set up stands to sell handicrafts or other specialties
from their country, also prepapring and selling typical national
foods, all around a program of music and dances in national costumes,
etc., performed by groups from each nation.
These different activities are arranged by the clubs or other
organizations of the different national groups, maybe also religious
organizations, for example, an Italian or Polish language Roman
Catholic group active in a local church.

It is all entertaining and interesting.  The different national groups
enjoy the opportunity to get together and to have the opportunity to
present themselves as a larger group (rather than feeling that they
are just individual foreigners),  the native residents are entertained
and get to try exotic foods or maybe buy interesting things that they
could not find in stores, and also appreciate and recognize the
cultures of the many foreigners in their community.

Multicultural festivals are generally a success and serve their purpose.

thay are when people from many countries come ans sell what things
like clothing julery and etc at a big market

well you see.... I'm not gonna drag this out like some people so they
seem like they know what they're talking about(no offence), so....

An often regularly recurring program of cultural performances,
exhibitions, or competitions of all "kinds" (...if you will...)
African, Cuban, Indian, Philippians come together and compete, Offer
foods and wisdom
And with no awards of any kind but to teach others of their history
and beliefs... and to have a good time although thanksgiving is now a
religious holiday to most.. if you think of why it was the Pilgrims
and Indians came together on that day.
 
There is really nothing else to say... it is what it is.