There‘s a wonderful service called answerthepublic.com, which gives you visual analytics on search queries.
Let’s say you type in “stories”, the service shows you what people are looking for when they google this word.
How do you use this service?
1. Open the website, choose a country and language
2. Type in 1-2 keywords, for example “instagram” or just “instagram tips”
3. You will then see a circle chart with search queries. The brighter the dot, the more popular the request
4. Pick any word you like and create content
Please note that without registering, you only get one search. When you register for a free account you get three searches per day. For a paid account you get more searches, of course. If you‘re not a serious marketer, three searches per day are enough, otherwise it‘s not.