From my experience, Croatia isn't one of the most famous countries so, if you're not sure, it's situated right across the Adriatic sea from Italy. Here's a map to help you out.
Croatia
The currency is the Kuna (pronounced a bit like 'ko-na' I think) and the exchange rate is about 7.5kn to €1. Croatia in Croatian language is 'Hrvatska', so that's why you'll sometimes see abbreviations like 'HRV' or 'HRK'. It's a cheap country in terms of prices, especially in comparison to the rest of Europe, but be careful as the recent surge in tourism along the coast means prices there for hotels, bars and restaurants are much higher, especially during the summer.
The capital city is Zagreb, which is located in the North. However, it is coastal cities such as Zadar, Split and Dubrovnik that are raising the profile of the country and bringing most of the tourists.
Politically, Croatia is a young country, having been formed after the break up of Yugoslavia in 1991. It only entered the European Union earlier this year.
Dubrovnik, in the far south, is an ancient city which reminds me of places like Greece or Turkey. It has recently rose to fame in TV show Game of Thrones, in which some scenes were filmed here.
Dubrovnik
Zadar has an airport, and is a likely place to fly into. There is a 'sea organ', in which waves crashing into the harbour makes tunes like an organ, and nearby is colorful a light up display built into the ground. I found a video on YouTube which demonstrates both better than words: Zadar Sea Organ
Croatia is becoming popular with party goers and young people, because alcohol prices are much cheaper than Ireland or the UK, and clubs often stay open until sunrise during the summer. The hot weather and clear seas make it popular with those looking for a cheap sun holiday, but Croatia has a lot to offer in terms of cultural capital and indigenous activities.
Blue Cave, located on the island of Bisevo
Also important to note, travel is cheap between neighbouring countries Serbia, Slovenia, Hungary, Montenegro, and Bosnia and Herzegovina, so a visit to Croatia doesn't have to just be a visit to Croatia, you could make it a wider travelling experience.
You can get flights with Ryanair to Zadar, and travel within the country is cheap, but I've been told that some buses (especially local transport) aren't air conditioned, so it can get a little stuffy in the soaring temperatures!
This article is linked to my radio show - The Travel Show. However, due to technical issues there is no recording available for this particular show. You can still go to the website and check out previous shows though. www.ulfm.ie/listen-back/
