Why do we need to flash Similarweb and Google Analytics together.

Many companies that do similar web data do not do Google Analytics, while companies that do GA do not do similar web because their algorithms are completely different, so the data does not affect each other.

GA is the true record of website traffic, while SM is a third-party estimate of website traffic. Generally speaking, GA data is larger than SM data. If the difference between the two data is too large, it is difficult to explain, so it is recommended to do both at the same time.