Understanding where your users come from and where they are spending time on your website is crucial.
Knowing where they come from helps you make decisions around strategy, what to focus on and where to put the money on acquisition channels to get more users, and where to stop putting money and effort.
Knowing where they land on the website + where they spend the time (or not) helps you to analyse behaviour to improve the flow to conversions.
Analytics should always be linked to the user behaviour in relation to the business goal.