Everyone has a different approach to labelling a quilt. Some don’t do it at all, others design and make embroidered labels. Some simply sign it with a marker, others screen print fabric and make it part of the back. Some just add a ‘signature’ bit of piecing or binding, others have custom labels made and sew them in. Truth be told, there is no right or wrong way to do it. What is most important is that you put your name to the work.
For one, be proud of the work you did. You made that! Put your name to it, on it, in it.
Secondly, give your quilt the history to live beyond you.
There are various schools of thought about what should be included on a quilt label. Here is what I think should be on it:
Anything else is just gravy. And gravy is good, so I include other things. I like to name my quilts so that is always there. If there is a specific inspiration or starting point, then that gets included. If I used a pattern I acknowledge it. If it is a gift, I like to put the recipients name on there too (and wedding/birth date if it is for that.)
Your name and the date is important. This is the history part. Should your quilt live beyond you or be separated from you (by choice or not) there is a record of the maker. If your grandchildren uncover the quilt one day they will want to know! So will the historian, the neighbour, the treasure hunter, the buyer.
Material make-up is very useful information for care instructions. I work almost always with cotton, including cotton batting and thread, so this helps any recipients present and future know how to wash it and care for it. If I use something different, then I include that. You could get super detailed here and list the thread used, batting chosen, and even fabric lines. The level of detail here is personal, but at least include material make up.