25 SEO Facts

1. Normal results may vary from personalized results

2. Results may vary when you change Google’s SafeSearch filtering

3. You cannot judge the popularity of a long tail keywords

4. You need not optimize for long tail keywords, they would rank by themselves

5. Search engine algorithm cannot be perfectly predicted

6. Sitemap is necessary if your site is not crawler-friendly

7. Meta descriptions are used as a reference for a page by Google in SERP, but they have less impact on search engine optimization.

8. If you don’t have a Meta description, then Google may sometimes display your site information from DMOZ, if you are listed there or it would display a relevant content from your webpage.

9. Search engine bots cannot read images easily

10. Low page rank sites may outrank high page rank sites

11. Sites that appeal to users, also appeal to search engines

12. Bots cannot reach a URL if it has got too many parameters

13. Google advises to use “Nofollow” attribute for the paid links

14. Google can index 18 types of files (PDF, Postscript, .atom, .rss, .dwf, etc)

15. No SEO company knows search engine optimization fully

16. If any site steals your content, then you may file a Google’s DMCA request to claim ownership.

17. Sending automated queries to Google to check a site’s ranking is against Google’s terms of service.

18. Parked domain names won’t typically appear in search results.

19. Google can now crawl and index content that is embedded in flash, but there is no guarantee.

20. Google doesn’t accept money to crawl a website more often

21. Google considers over 200 factors while displaying results

22. Google has different data centers to retrieve results

23. Nofollow tag is applicable only for Google and not for other search engines

24. Your competitor cannot harm your search engine ranking

25. Google encourages you to write original content

Feel free to comment on any other facts.