There are various types. The most common one is recognized in the business world as having an idea and putting it into action. It will usually refer to a business idea and is usually a new or different idea, something that has not been seen before, or something that provides a new twist on an existing sector. A social entrepreneur is someone who has innovative ideas for social change, or new solutions to social problems and dedicates their time to these ideas. This might include addressing issues of inequality or poverty, or creating a new charity to address such issues. A serial entrepreneur refers to someone who has a lot of ideas and constantly starts up new companies or enterprises to implement these ideas. Generally a serial entrepreneur will have achieved good success or successes with previous ventures, allowing him/her to start up new ventures. A lifestyle entrepreneur refers to someone who starts up their idea or venture based on something they are passionate about - such as a sporting venture relating to their favourite sport. For this type of venture, usually large start-up costs are required and often people who have been successful in the business world might make this transition to get involved in something they are highly passionate about.