Use Google Trends to see the level of interest in a particular topic, product or service and how the interest has varied over time.
Background market data/statistics
You may wish to find out which consumers spend more on a given product, compare inflation rates, household incomes or locate demographic data. The databases below provide statistical data:
MarketLine Advantage
The database section of MarketLine provides statistical time series on countries, cities, and consumer data.
It covers global food, drinks personal care household products, pet care, news and magazine and tobacco markets only.
To access data and forecasts from the home page go to: Databases > country statistics, or pick market data for consumer market figures.
Statista
A statistics portal providing statistics, reports (dossiers) and infographics. It incorporates free and subscription data sources and covers 600 industry sectors and is particularly strong on social media and consumer products.
Bloomberg
Use the <BI> Bloomberg Industry function and select sector and sub-sector to locate sector statistical data - Key indicators.
Or go to the <ECON> page to search and download economic statistics.
International Statistical Offices
A list of these by country and of international statistical organisations: Eurostat, ILO, FAO, etc.
Global Open Data Index
Claims to be the most comprehensive snapshot available of the state of open government data publication.
Google Dataset Search
Helps researchers locate online data that is freely available for use. More detail here