You could post photos of your ancestors.
You could share photos of people you can’t identify, in the hopes that someone can.
You could share photos and stories of the places your ancestors lived.
You could share photos of all the graces in a (small) cemetery.
You could share photos of the graves of your ancestors.
You could tell stories about your ancestors, or the times they lived in.
You could share snippets from the newspapers of the times.
You could pick an ancestor and describe everything you know about them.
You could pick an ancestor and ask all the questions you need answers to.
You could share pictures and documents about the land your ancestor owned.
You could describe a particularly memorable event in your own life, or in your research journey.
There are many, many possibilities.
This is my more traditional blog about social media and genealogy. It’s very different to this one, so I hope you can see how the two different types of blogs (that one and this one) could be used for different purposes.