Organic and paid search results are two types of SERP results that are displayed based on quality and relevancy to the user query. On the SERP, organic results are not paid to appear. Therefore is quite difficult to rank highly organically, and it necessitates the use of SEO.
Paid results need keyword bidding, and they are positioned above the organic search results on SERP depending on the Max CPC (cost per click) and quality score, and they are paid adverts. The higher your score, the less you’ll have to spend.