This document discusses Google's mobile-first indexing which prioritizes mobile-friendly pages in search results. It launched in November 2014 and affects rankings globally in all languages. Only pages, not full sites, are evaluated. Reasons for the change include the growing number of mobile searches and need for a good mobile user experience. The document also compares approaches to building websites - responsive design has one URL but can be slow on mobile, while dynamic serving or a separate mobile site allow custom mobile experiences but are more complex to maintain. Case studies show how visibility scores increased for sites that improved their mobile-friendliness.

1. How to survive
THE MOBILE
REVOLUTION

2. 600+ algorithm updates / year

4. Mobile signals
User Experience (May 2014)

5. Mobile signals
Mobile Usability in GWT (October 2014)

6. Mobile signals
Mobile-friendly test (November 2014)

7. Mobile signals
Mobile tag

8. This update
• Affects only search rankings on mobile devices
• Affects search results in all languages globally
• Applies to individual pages, not entire websites

9. BUT WHY?

10. Mobile signals

11. 171 KW, 441K searches

12. 1100 KW, 438K searches

13. 210 KW, 105K searches

14. 849 KW, 204K searches

15. 369 KW, 322K searches

16. 1784 KW, 587 K searches

17. 320 KW, 146K searches

18. 897 KW, 479K searches

19. 1400 KW, 969K searches

20. 159 KW, 103K searches

21. 635 KW, 163K searches

22. 149 KW, 92K searches

23. 983 KW, 485K searches

24. 736 KW, 136K searches

25. 1150 KW, 331K searches

26. 2000 KW, 1.5 mil searches

27. 134 KW, 83K searches

28. 515 KW, 137K searches

29. 830 KW, 270K searches

30. 93 KW, 48K searches

31. Responsive web design
Pros
-Only one URL
-Easier and cheaper to maintain
-No need for complicated redirection
Cons
-Pages that are fine for desktop may be slow on
mobile
-Harder to implement on complex websites

32. Dynamic serving
Pros
-Only one URL
-Ability to create a fully mobile-centric user
experience
Cons
-There are 2 sets of HTML files (higher cost of
maintenance)
-Complex technical implementation
-Constant updates of the user agents list

33. Separate mobile site
Pros
-Ability to create a fully mobile-centric user
experience
-Easier to implement initially
Cons
-There are 2 sets of HTML files (higher cost of
maintenance)
-Needs a subdomain with different configuration
-Can be more prone to errors.

35. The change in visibility score (August vs April)

36. THANK YOU!
RADU MĂRCU UȘ
radu.marcusu@seomonitor.ro
@marcusuradu