Hi Shardul,
Once you setup the excel template. You can navigate to the Import files tab – here you can choose the template and add the file with the data which can be imported as defined in your template. This usually is for a developer/administrator only
Of course, if you need your users to do this, I’d recommend to add a microflow which will fetch the required template and similar to how you upload the excel file in the Import files tab – give the end user to upload the data in the same format.
You could additionally give them an option to download the template structure so that they add data in the required format only.
Hope this helps!