Yes spreadable butter is real butter made from milk which is healthy.
However spreadable butter contains some amount of vegetable oil along with the spreadable butter to make the spreadable butter easy to spread.
The spreadable butter is mostly healthier than other types of butter such as Margarine which is mostly fat.
But for spreadable butter and other types of butter it's much healthier for you to eat.
The most healthiest butter though is homemade butter made from cows milk at home.
Not many people make homemade butter anymore but some people do and it's delicious and more healthy.