This tricks in not only for WordPress but for all websites. On my client web pages I have often seen images with a special character in their image name and because this can be a quite a big problem, here are my suggestions how to name images properly:
- don’t use š, č, ž or other characters
- don’t use special characters like ? . or ,
- use lowercase letters
- to separate more words use _ or –
After uploading image don’t forget to add Title, Caption, Alt Text and Description. It is great if you fill all fields, but if not, try to add at least Title and Alt Text.