We can disable “spossibily related posts” here > Appearance > Extras >
__ Hide related links on this blog, which means this blog won’t show up on other blogs or get traffic that way
Click “Update Extars”
Do be aware that it’s usually new bloggers who do not have a large archive who wish to disable this function. When your archive grows the “possibly related posts” will include posts in your own blog. I watch to see what’s displayed and if the posts being displayed are not related then I disable “possibly related posts” for a day or two and enable it again.