es cada vez más - it's more and more "es cada vez más difícil encontrar buenos amigos hoy en día" "it's more and more difficult to find good friends nowadays. "

The best way to understand the difference between “ser” and “estar” is: Ser: it means a description of something, e.g, el precio es alto, you are describing its value. Estar: it means a state, e.g, el precio está alto, normally that price is cheaper, but now it changed. I hope I have helped.

How you use Ser and Estar depends on how you understand the reality. For instance, if you have an old friend from school, Peter, and since you know him, he is kind of ugly. Then you don't see him for some time, and you meet again when you finish the university, and he is changed and looking much better than before. Then you will say "Peter está muy guapo". This is because you categorized Peter as an ugly person, but now you are changing him from category. Then you introduce Peter to your friend Anne for the first time. Then your friend will say "Peter es guapo", because Anne is putting him in a category (and not moving from one category to another). This is why you can use Ser o Estar in the same phrases, with just a slight semantic difference.

Estar means the specific situation for example: voy a estar sentado / I am sitting is how you are in that moment

Those are kind of "fixed phrases". You can say: " El está cada vez más alto" almost like "becoming" or "getting" whilst "El precio de la comida es cada vez más alto" can mean "becoming" or "getting" but this time is like a "characteristic". It is a tough topic, I'd recommend you to watch videos about it or read articles about this "ser vs estar" problem