Paste it as a note on an associated contact or make a dummy contact for it.
Yes it's utterly stupid that there's no proper feature for pinned texts/notes.
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Yes it's utterly stupid that there's no proper feature for pinned texts/notes.