Summarize this article:

Once you’ve measured and chopped your chocolate, put it into a container that’s safe to go in the microwave. Typically, these include dishes made of glass, ceramic, or plastic that’s labeled for use in a microwave.  If you’re not sure if your bowl is safe to put in the microwave, check the bottom for a symbol that looks like 3 wavy lines, or one featuring a dish with wavy lines above it. These both indicate that a dish is microwave-safe. The dish may also say something like “Microwave safe” on the bottom. Using a dish that’s not microwave-safe could cause the chocolate to scorch, your dish could break, or it could even be a fire hazard. Turn the power down to the lowest heat possible on your microwave. Then, heat the chocolate for 15-30 seconds. When the timer goes off, remove the bowl from the microwave right away.  Opt for 15 seconds for small pieces of chocolate, like mini chocolate chips. For larger pieces, your first blast should be closer to 30 seconds. Do not microwave the chocolate for longer than 30 seconds, or it will scorch. If the chocolate doesn’t seem melted at all after 30 seconds, change the microwave to 50% power instead.

Summary:
Place the chocolate into a microwave-safe bowl. Microwave the chocolate on the lowest heat setting for 15-30 seconds.