Could there be an issue when you post an advertising sign with a name of a brand? I heard that it’s sometimes an issue due to rights.
Hi @Alderd
Signs in public areas should not be a copyright problem.
I photograph tons of stores with signs showing the store name all the time and post them on Google Maps.
In my experience the AI filter checking our uploaded photos do not like photos showing only a sign. We should always try to include some of the surroundings also in our pictures to make it easier for Maps users to understand and get help from our photos.
One exception is a close up of signs with the opening hours. They can be machine read by Googles computers.
I hope this answers your question.
Cheers
Morten
PS if you intend to advertise by posting photos of special offers this is not acceptable. We can not mix the interests of businesses with being a Local Guide.
Dear @Alderd
Welcome to Connect! 
I noticed that you are new here, So I’d like to share with you some articles to make your experience here better.
Please check out:
14 helpful tips for using Connect
How do I follow the original content guidelines on Connect
Introduce Yourself - December 2020,
Do you have any photos to share with us? It would be great if you add them to your post, so we can know more about this post.
Don’t forget to also upload photo
Hi @Alderd ,
Welcome to Connect.
I see @MortenCopenhagen has given you a precise answer to your question. In addition to it you may also take a look at the Format Specific Criteria article where you may find more information about the contributions on Google Maps.
Please note that I am going to relabel your post to the How-tos section of Connect as this is the place to ask questions, share feedback and tips.
Thanks