This game is actually crucial to both team, for Barcelona they need to win this game to help them get back their winning psychology as they have not been doing so well in the last two games and for betis they will need it so they can probably have a chance to climb up the table and it will be on the record they won such a big team this season but in reality they don't look like they are going to win Barcelona is something betis may not be able to achieve even if they try and they aren't the favorite for many others out there so I'm very certain about the fact that Barcelona will literally fight hard to make sure they don't loose this game.
Barcelona will definitely be a tough opponent for Real Betis. As I write this, the game is being broadcast live. It looks like Barcelona will win the match very easily, Barcelona is ahead in possession and they are playing very attacking. Barcelona is ahead in the match result. My possible result will be in favor of Barcelona and Barcelona may be able to score 3 goals or more.
Today's match is very important for Barcelona to maintain the top position of the points table and increase the point difference with Real Madrid. Several matches of Barcelona have not gone well at all. Today's match will help them boost their confidence.
On the other hand, Real Betis will try their best to win today's match and get a position in the top ten. Although it will not be very easy for them to win against Barcelona. But they will definitely try to get a position in the top ten and beat a strong team like Barcelona.
The first half wasn't as easy as you said, because Barcelona struggled to score just one goal on the 40th minutes of the match by Lewandowski with a clinical finish to put Barcelona on the lead after he got an assist from Kounde. Real Betis also had some good chances but they couldn't convert it to a goal, and the first half ended 1-0. It's possible for Barcelona to score more goals in the second half.