SemRush question: Traffic Analytics

Hello friends!

I'm going crazy, I'm learning how to use Semrush and there are things I don't understand. For example, in the Domain Overview section for a web X gives me a result of 145 monthly visits in Organic Search Trafic (-89) and if I go to the Traffic analytics section, it tells me that this website has a flow of visits of 28.3 k and unique visitors 28.3 k. This happens with many domains that I am analyzing and I can not understand it. Why such a brutal difference in traffic statistics?

Thanks in advance

Maybe this is too basic for you but here goes...
When I first started using semrush I had a hard time finding good keywords. I was too reliant on the keyword magic tool. If you find yourself in this situation I'd recommend using the organic search tool which can show you ranking keywords for specific urls that you may want to emulate.