Mergers in digital industries happen frequently. Just tech giants have triggered hundreds of acquisitions the past decade globally. In the meanwhile, competition in digital era displays distinct features that pose challenges in merger control practice. Thus in what way such mergers should be treated and evaluated in a merger control context bewilders both practice and academia. Against this backdrop, in order to streamline the process and obviate a protracted merger review simply due to its involvement of digital industries, from a merger control-practice angle and with referring to literatures and practices in major jurisdictions, this article seeks to offer key considerations of thorny noval issues at each important aspect of merger control in digital era and propose possible solutions to locate an optimal trade-off between public and private sides. The article discusses the following issues in digital era in sequence: Notification threshold’s application and modification; Market definition; Indicative role of market shares; Impacts of peculiarities of digital markets in competition analysis; Possible ways to seek the optimal trade-off; and Concluding remarks