You can watch "Will & Grace" streaming on Hulu. It is also available for purchase as a download on platforms like Fandango At Home, Amazon Video, and Apple TV. The show is not available for free streaming currently, but Hulu offers the entire series for streaming with a subscription. Additionally, "Will & Grace" is available to stream on Stan (Australia) and it also airs new episodes on NBC. Netflix also lists the show, so it may be available there depending on the region. Summary of options:

• Streaming: Hulu (full seasons)
• Purchase/download: Fandango At Home, Amazon Video, Apple TV
• Other platforms: Stan (Australia), NBC (for new episodes), possibly Netflix depending on region.