After the completion of an MSc, you are qualified to pursue a PhD. Most doctoral programs require you to have a master's degree, but these may differ according to the field and different universities. You should verify that your MSc fits within the research scope or concentration of the PhD program you are targeting. Besides, some PhD programs accept candidates only with a solid academic background even without achieving the required degree, directly by admissions or through an integrated or direct entry scheme.
You also benefit during your MSc in gaining experience in research since many PhD programs require candidates who have a research-based background. Prepare yourself in writing research proposals or undergoing interviews because PhD programs usually have selection criteria that is strict. Deepening specialized knowledge and independent research characterizes the transition from MSc to PhD, which has led to much academic contribution in academia.