Start the topic with a title that briefly describe the problem so people will know about what this is about.
Don't try to explain all the problem in the title.
Use tags to make it easy for other users to find posts about similar issues. If posting about Opera Mail then add the 'Opera Mail' tag
In the post (body) you should include the following information:
Version of Android
Phone model and manufacturer
Your version of Opera for Android
If the problem is with a page, a link to it
If ad-blocker is enabled or not
If data savings is enabled or not
A screen-shot of the problem if it's related to something not showing as should
A description of the problem, including as much as information as possible
Steps to (try to) reproduce the issue
Expected behavior and actual one