In this chapter the author explores trademark law's application in the digital context. The chapter covers key points including designation rights, classification of designation rights, concurrent protections, purposes, and functions of trademark rights, the notion of trademarks, trademark application, opposition, protection period, duration of protection, rights arising from trademark protection, trademark limitations, and trademark as an object of ownership. This chapter provides a comprehensive overview of trademark law's application in the online environment, including its nuances and legal aspects.