There are several Turkish visa types that define the traveler’s intended purpose for travel to Turkey:

NOTE : Some types of Turkish visas have additional requirements than those listed above. Accordingly, you are advised to check the information requirements for your specific type of Turkish Visa application.
All Turkish visas require application from abroad through Turkish embassies, consulates, or authorized visa application centers (VACs). However, eligible foreign nationals, from over 50+ countries, can apply for the Turkey Tourist Visa online through the Turkish e-Visa system.
Travelers should not exceed the period of stay granted to them in the visa. It is the traveler’s responsibility to verify that they have not exceeded the duration period granted to them, as exceeding the granted duration period may lead to a fine.