Is protectionism good for a country's economy?

In economics, protectionism is the economic policy of restraining trade between states (countries) through methods such as tariffs on imported goods, restrictive quotas, and a variety of other government regulations designed to allow (according to proponents) fair competition between imports and goods and services produced domestically. According to its proponents, protectionist policies protect the businesses and workers within a country by restricting or regulating trade with foreign nations. More: en.wikipedia.org.