Answer:
Researchers have to deal with relevancy. That is when 300,000 (example) search for same term and which site has been visited most often. that is why some domains always appear first page in results. Another bugaboo is the idea of related content. Some search algorithm go by synonyms to direct traffic to paid advertisers. that is how a search for a "ford" part will have results that list "chevy."
may come up with something unsuitable and may take to much time looking for your chosen website.
I think there are two major disadvantages that you might face with search engine as you get more visitors you also get more scam and sometimes u might become cost efficient as you will need more and more people to advertise your website online. I feel like dating sites usually have the greatest search engine optimization techniques and when i was learning SEO I was going through 'dream marriage' and eharmony and all other dating websites to see their styles.
2 Disadvantages of Search Engine Optimization.
1Regardless of the growing sophistication, many well thought-out search phrases produce list after list of irrelevant web pages. The typical search still requires sifting through dirt to find the gems.
.Using search engines does involve a learning curve. Many beginning Internet users, because of these disadvantages, become discouraged and frustrated.