First of all, you should know that South Korea has a visa waiver agreement with many countries, which means that citizens of those countries do not need a visa to visit South Korea as a tourist for up to 90 days .  
You can check if you need a visa, along with other information here! 
https://www.ivisa.com/south-korea/blog/south-korea-visa-waiver-countries 

If you are not from a visa-exempt country or you want to stay longer than 90 days or work in South Korea, you will need to apply for a visa at the nearest Korean embassy or consulate in your country. There are different types of visas depending on your purpose of visit, such as tourist visa, working holiday visa, student visa, work visa, etc.  

To apply for a visa, you will need to fill out an application form, prepare the necessary documents (such as passport, photo, invitation letter, etc.), pay the application fee, and submit them to the embassy or consulate. The processing time may vary depending on the type of visa and the volume of applications. You can track the status of your application online here: https://www.immigration.go.kr/immigration_eng/index.do 

I hope this blog post has helped you understand the necessary visas for traveling to South Korea in 2024. If you have any questions or concerns, please feel free to contact me or leave a comment below. I wish you a safe and enjoyable trip to Korea!