AD
are advertisements that appear at the top of search engine results pages (SERPs). Advertisers bid on keywords and pay each time someone clicks on their ad. Paid ads allow for quick visibility, precise targeting, and measurable results.
When we use search, we will be targeted with ads if Google deems we are relevant buyers. There are a bunch of factors are play that determines who the ads are shown to.
Organic Search Results
are the unpaid, natural listings that appear below the ads. Companies optimize their websites through SEO to rank higher in these organic results. Organic results generally have higher click-through rates and credibility with users.
Google will display all relevant websites related to the search keywords over a number of pages (which you can see at the bottom of the page). There could be hundreds of websites on the internet so Google will display the websites in the order of website rankings (based on popularity, how long the website has been around, etc.). As per Google, it can typically take around 4-6 months to start gaining some traction which again is based on how many visits the website has been able to garner.