Mark the TM mark when the trademark has not yet become a registered trademark. This is to tell the public that this graphic or text is used as a trademark of goods or services, not as a name or advertisement, so as to avoid the marked graphic or text from flowing into the public domain, instead of applying for being a registered trademark and enjoying exclusive rights;
At the same time, the trademark logo can also be used as proof that graphics or words are used as trademarks. When applying for registration of a trademark, it enjoys the prior right to use it.