In simple words Trademark can be understood as a sign or combination of signs which helps one in distinguishing and identifying the goods and services as those produced or provided by a specific person, organization, company or enterprise.
Trademark could mean any logo, word, label, name, combination of colors, shape of the goods etc. which helps one in distinguishing and identifying the goods and services as being provided by a specific person, organization, company or enterprise. E.g., Lenovo is a Trademark which helps one identify the product as compared to other similar products.
Trademark aids one in distinguishing the goods and services from the similar kinds of goods and services provided by others. Trademark is a broad concept and it is one of the types of intellectual property.