These are concise, readable and up-to-date summaries covering specific markets and regions created by specialist market research publishers like Euromonitor or Gartner. They may be a combination of original research conducted by the authors or summaries and analysis of existing research and data from sources including:
National statistics offices
Company financial data and reports
Interviews with people in the trade
Summaries of business news
Reports are the best source for market research but they are usually not freely available online. For example, I ran this search on Google recently:
And this was a typical search result I found:
Note the price! Its typical to pay between €300 and €5,000 for a report that may be only ten pages long. This is because these reports tend to be very market specific, they have short shelf-lives and they're created for industry. If you Google for market research with a specific report in mind, you'll probably find exactly what you want, but it will be behind a paywall.
If you can't get access to a report that has exactly what you want, try broadening your search. For example, if you're looking for info on the market for flat-screen TVs in the UK and you get nothing, try broadening your search geographically (flat-screen TVs in Western Europe) or by market (consumer electronics in the UK).