What is the difference between trademark (TM) and registered(R) in the logo of a company?

Register trademark in Vietnam

Trademarks are for words, symbols, devices or names that are used to distinguish the goods of one manufacturer or seller from that of another. Any distinctive name, symbol, or word is designated as trademarked with the symbol "TM". If a company has trademarks that are not officially registered, it can use the letters "TM" to show that it claims ownership of the mark. A company must continue using the "TM" symbol until the trademark office actually registers a mark. A company cannot use the R circle symbol while a trademark registration application is still pending.

R(Registered Trademark)

A company can only use the circled R symbol in conjunction with its products and brands if it has officially registered a trademark with the trademark office. A company can continue simply using the "TM" symbol in conjunction with its brands instead of officially registering a trademark and using the R circle symbol, but trademark registration carries certain legal benefits. Trademark registration includes public notice of the owner's claim to the mark, a legal presumption that the party that registered the mark owns it and has the exclusive right to use the mark.