For Trademark Registration, the goods and services are classified into 45 different classes. The most recent change in TM Classification is done by World Intellectual Property Organisation (WIPO) on 1st Feb 2018. Classes 1 to 34 pertains to goods and classes 35 to 45 are for services. The protection of the trademark is legally enforceable only within the specification of a specific class of trademark for which it is registered. Some time one trademark and the goods or services associated with it falls under multiple classes, in that case, the application should be filed in all such classes.
Check your Classification - http://euipo.europa.eu/ec2/