What is VISA its uses?

I want to make a VISA and for that I want to get the details of what is VISA its uses so can you provide me that?

[Arun Vats]

As you want to get the details of what is VISA its uses so here it is for you:

A visa is a conditional authorization given by a competent authority of a country for a person who is not a citizen of that country to enter its territory and to remain there for a limited duration.

Types:
Transit visa, for passing through the country to a destination outside that country. Validity of transit visas are usually limited by short terms such as several hours to 10 days depending on the size of the country and/or the circumstances of a particular transit itinerary.
Airside transit visa, required by some countries for passing through their airports even without going through passport control.
Crew member, steward or driver visa, issued to persons employed or trained on aircraft, vessels, trains, trucks, buses and any other means of international transportation, or ships fishing in international waters.
Short-stay or visitor visa, for short visits to the host country. Many countries differentiate between different reasons for these visits, such as:
Private visa, for private visits by invitation of residents of the country.
Tourist visa, for a limited period of leisure travel, no business activities allowed.
Visa for medical reasons, for undertaking diagnostics or a course of treatment in the host country's hospitals.
Business visa, for engaging in commerce in the country. These visas generally preclude permanent employment, for which a work visa would be required.
Working holiday visa, for individuals traveling between nations offering a working holiday program, allowing young people to undertake temporary work while traveling.
Athletic or artistic visa, issued to athletes and performing artists (and their supporting staff) performing at competitions, concerts, shows and other events.
Cultural exchange visa, usually issued to athletes and performing artists participating in a cultural exchange program.
Refugee visa, issued to persons fleeing the dangers of persecution, a war or a natural disaster.
Long-stay visa, valid for longer but still finite stays:
Student visa, which allows its holder to study at an institution of higher learning in the issuing country.
Temporary worker visa, for approved employment in the host country. These are generally more difficult to obtain but valid for longer periods of time than a business visa. Examples of these are the United States' H-1B and L-1 visas. Depending on a particular country, the status of temporary worker may or may not evolve into the status of permanent resident or to naturalization.
Journalist visa, which some countries require of people in that occupation when traveling for their respective news organizations. Countries which insist on this include Cuba, Iran, North Korea, Saudi Arabia, the United States (I-visa) and Zimbabwe.
Residence visa, granted to people obtaining long-term residence in the host country. In some countries, long-term residence is a necessary step to obtain the status of a permanent resident.
Asylum visa, issued to people who have suffered or reasonably fear persecution in their own country due to their political activities or opinion, or features, or association with a social group.
Immigrant visa, granted for those intending to immigrate to the issuing country (obtain the status of a permanent resident with a prospect of possible naturalization in the future):
Spousal visa or partner visa, granted to the spouse, civil partner or de facto partner of a resident or citizen of a given country to enable the couple to settle in that country.
Marriage visa, granted for a limited period before intended marriage or civil partnership based on a proven relationship with a citizen of the destination country. For example, a German woman who wishes to marry an American man would obtain a Fiancee Visa (also known as a K-1 visa) to allow her to enter the United States. "A K1 Fiancee Visa is valid for four months from the date of its approval."[6]
Pensioner visa (also known as retiree visa or retirement visa), issued by a limited number of countries (Australia, Argentina, Thailand, Panama, etc.), to those who can demonstrate a foreign source of income and who do not intend to work in the issuing country. Age limits apply in some cases.
Official visa is granted to officials doing job for their governments or otherwise representing their countries in the host country, such as the personnel of diplomatic missions.
Diplomatic visa is normally only available to bearers of diplomatic passports.
Courtesy visa issued to representatives of foreign governments or international organizations who do not qualify for diplomatic status but do merit expedited, courteous treatment - an example of this is Australia's Special purpose visa.

Visa refusal:
has committed fraud, deception or misrepresentation in his or her current application as well as in a previous application
has obtained a criminal record, has been arrested, or has criminal charges pending
is considered to be a threat to national security
does not have a good moral character
has previous visa/immigration violations (even if the violations didn't happen in the country the applicant is seeking a visa for)
had their previous visa application(s) or application for immigration benefits refused and cannot prove that the reasons for the previous refusals no longer exist or are not applicable any more (even if the refusals didn't previously happen in the country the applicant is seeking a visa for)
cannot prove to have strong ties to their current country of nationality and/or residence (for those who are applying for temporary or non-immigrant visas)
intends to reside or work permanently in the country she/he will visit if not applying for an immigrant or work visa respectively
fails to demonstrate intent to return (for non-immigrants)
fails to provide sufficient evidence/documents to prove eligibility for the visa sought after
does not have a legitimate reason for the journey
has no visible means of sustenance
does not have travel arrangements (i.e. transport and lodging) in the destination country
does not have a health/travel insurance valid for the destination and the duration of stay
is applying on excessively short notice without an exceptionally justifiable reason
is a citizen of a country to which the destination country is hostile
has previously visited, or intends to visit, a country to which the destination country is hostile
has a communicable disease, such as tuberculosis
has a passport that expires too soon
didn't use a previously issued visa at all without a valid reason (e.g., a trip cancellation due to a family emergency)