Glad I found my colleague in this article. I am also SEO keyword "sim số đẹp" for website simthe.vn. This is really a very competitive keyword in the field of telecommunications services in Vietnam.
But recently, I've been monitoring it seems that google is changing the ranking scores because many keywords have a lot of search volume such as: sim Viettel, sim phong thủy, Mobifone sim, Vinaphone,... now no need. Pointing too many backlinks for competitive keywords anymore, but google is paying more attention to the content provided to readers on these pages.
Zack Barton, do you think what I just said is true?
