Below is from the same site. I believe it is referring to applicants from countries that require an advance visa (as opposed to US, Canada
, etc... which get visa on arrival). Normally, for a tourist visit, people from these other countries would get a single
entry visa (if approved). If they do business, they could apply for a multiple entry visa (with higher standard for approval), so they can come and go without violating the 90/180 rules. Most 1st world western countries already get a multiple entry visa (in effect if not in name):
5 year multiple-entry Schengen visa
5-year MEV is granted to people that travel a lot to the Schengen Zone, especially for business. This visa permits you to enter 26 countries in Europe
as many times as you wish, within five years, as soon as you do not violate the 90/180 days rule
You will need to show very strong proof that you travel frequently to any of these countries and why you travel. In addition, you will need to show evidence why a visa with a validity of 5 years is necessary for you.