The President of the Swiss Confederation is the chair of the Federal Council of Switzerland and is the first amongst equals of councillors of the executive branch of the Swiss government.
Role
Under the Swiss constitution of 1999, the Federal Council is the "highest executive authority". Although the president of the confederation has some extra duties to represent Switzerland, he is not the head of state.
All decisions are that a head of state would make are decided by a meeting of the Federal Council. For example, treaties are signed on behalf of the Federal Council, and all members of the federal council sign the "letters of credence" to introduce ambassadors sent by Switzerland to a foreign country. All ambassadors sent by a foreign country to Switzerland meet all of the members of the Federal Council, not just the President.
The President of the Confederation is sometimes called the "primus inter pares" (first equal) in the Federal Council.
Only three other countries in the world do not have one person as a head of state, Bosnia and Herzegovina, Andorra and San Marino.