Importing goals on Google ads will be useful if you ever use a smart campaign that will track users who have converted. Additionally, you will be able to see from which source the users are coming from and which Google Ads Campaign.
Home page of Analytics
Top right corner Tools > Conversions.
In the tab that is showing. We are going to import the conversion by clicking the blue +.
Then we choose Import.
We pick From Analytics and continue.
In this last section, we will be able to see the goals that we created on google Analytics if our property is correctly linked with our account. Check the boxes and then import and continue.