Yes, the suggested edit ended up being approved by the reviewers... and it was rolled back by a moderator, who, in the process, manually banned you and probably all of the reviewers that approved the edit suggestion.
The reason is that the text being added to the wiki excerpt was plagiarized from an external source. One of the reviewers correctly rejected the edit with this exact reason. Read more at Let's stop tag wiki plagiarism and Stopping tag wiki plagiarism, Part II: Taking Action to see why this is something the community wants to stop.
You can find some guidance on how to write good wiki excerpt here or here. In short, you should try to explain when the tag should be used and what kind of questions should have it.