PowerPoint is a reliable and functional tool for designing posters, there are other software options, but if you are new to design, learning a new tool in addition to developing your poster can be an extra time burden!
Use Templates to hep you get started!
Grab your audience with a clear and legible title - physical posters in poster hall exhibits should invite your audience in to come and find out more about your research.
Keep fonts legible and large enough for readers to engage with:
Avoid being too text-heavy. Most posters should aim to keep the word count to under 1000 words.
Look for visual ways to convey your findings: graphs, charts, flow charts, info graphics.
Use large clear fonts
Use color contrast that has been checked for readability
Use Alt-text to describe images and figures for screen-readers