Hi Demetrios,

It's difficult to say exactly how it'll affect your DA or PA - like PageRank there's a considerable number of factors and contexts that build that ranking.

Domain Authority is in part built up from your MozTrust score. The MozTrust is roughly calculated by measuring how many sites sit between your website and a trusted website. Educational and Government websites tend to be considered trusted websites, so if they link to you directly the MozTrust there is very high indeed.

Be aware though, you shouldn't build your site's success on the back of one or two trusted links. You need diversity and as many trusted relevant sites as possible to "back your credentials up" to Google and other search engines.

I know that's vague, but I hope it helps. Learn about how MozTrust works.

Hi Juan Miguel Callejas Romero,

It looks to me as though those two websites are identical. I would definitely settle on one of those domains and then set a 301 from the 'discontinued' domain to the new one.

If you have a market outside of spain, I'd probably advise you go with the .com. If I'm in the UK and see an .es domain I'm unlikely to click on it. Conversely, if you're exclusively in Spain and as a Spanish resident I see .es in a sea of .com's I'd likely click on that.

In summary: select the TLD which you think will have the best click-through rate (analytics may shine a light on this) and then 301 the other to that domain.

• Andrew