what are the advantages and disadvantages of SEO?
There are only advantages of SEO.
Advantages:
1) It's free
2) You can get targeted traffic
3) You get people who are actively looking for answers/solutions
Disadvantages:
1) It can be competitive
2) Therefore it can be slow
3) You need to create good content that people are actually interested in
4) You need to be proactive in building links
5) Google can come along and shut off your traffic with an algorithm change, which gives you uncertainty.