Just wondering whether it is allowed.
I want to ask for recommendation of CDN services because I guess my current CDN is not fast enough.
Can I just post it here or it's not allowed?
You cannot ask for recommendations on this site, or most Stack Exchange sites.
We find that questions that ask for recommendations attract spam answers.
With recommendation questions, the voting system can turn into a popularity contest for which recommended service is best. The voting is supposed to be used for well written answers.
We close such questions with the reason:
Questions asking for recommended external websites, tools, resources, and software are off-topic as they tend to attract opinionated answers and spam. Recommendations for software are permitted on Software Recommendations, but be sure to read their quality guidelines before posting there.