What does it exactly means when Google brings the "brand name" to the beggining of the page title in search results when it was actually given at the end?

[vtmoz]

We see many times...page titles starts with "brand name: page for etc" where actually "brand name" has been given at the end and keywords at beginning. Why does Google make this change? I noticed this happens when similar title tags are used by multiple websites for high difficulty keywords.

Thanks

[KevinBudzynski]

Because Google believes that it is better for the user based on their query:

There’s a simple reason for this: the title tag as specified by a webmaster is limited to being static, fixed regardless of the query. Once we know the user’s query, we can often find alternative text from a page that better explains why that result is relevant. Using this alternative text as a title helps the user, and it also can help your site. Users are scanning for their query terms or other signs of relevance in the results, and a title that is tailored for the query can increase the chances that they will click through. See Google's artcile: Create good titles...

[Roman-Delcarmen]

My Respect very good answer