If I were looking for feedback on any wording I'd done for an advertising campaign, would this forum be a suitable place to ask it? Or is it more intended for writing for fiction?
This site isn't just for fiction; we welcome questions about all types of writing. If you browse the tags you'll see technical writing, scientific writing, and journalism, among others.
However, it sounds like you're looking for a critique, which is off-topic. You're welcome to ask questions about advertising writing, and to use examples from your own work, but the question you ask needs to be a question about some writing technique or consideration, not about feedback.
I know this can sound like hair-splitting. Please read the post I linked to, which explains it in a little more detail.