For what it's worth is an idiomatic phrase that means what someone is going to say may not matter or have any value, but is being said anyway. There are various synonyms for the phrase such as, "take it or leave it", "it may not mean much", "in any case", "anyway", "though it may not seem significant", and "on a related note". These phrases convey the same message as "for what it's worth" - that the speaker may not think their message has any impact or value. Using synonyms can help avoid repetition and bring variety to language, keeping it fresh and interesting.