It always helps to have more than the title when someone's trying to rec you a new thing and get you excited and curious enough to want to watch it.

What kind of plotlines do the episodes have? Is the show fantasy, or fiction? What do you think is the best episode, or the most interesting one to watch if you want to get a taste of the show to see if you'll like it?

A single episode can easily provide a gateway into a new show: I got into Supernatural after my friend told me excitedly about a new (at the time) episode called "The French Mistake", in which the main characters got sent into an alternate reality where their lives were a TV show, and the entire cast basically just poked fun at themselves and it was hilarious. (It's in season 6, if anyone's curious.) That hit my love of AUs and meta, and so I went home and watched first that and then another handful of episodes that looked especially interesting...and then I just went and started from the beginning. I stuck with that show for a good...nine seasons, I think? Maybe ten? I've fallen out of it over the past few years, but that's not the point.

The point is that if you can get someone excited about a book, or a show, or a soundtrack, or a movie, or a group...that's what will make them more likely to check it out. They need to catch some of your excitement. That won't always work, obviously--outside of time constraints and so on, people won't necessarily share your taste enough to get excited to begin with--but if you tell them a bit more than the title (say, the show's premise, particular actors, characters or plot premises you think they'll love, the things Neshomeh mentioned), there's more of a chance they'll get into it.

~Z, with apologies for any uncaught typos. Autocorrect is an interesting thing.