As I wrote so long ago, Labels are probably the most significant feature of (New aka Beta) Blogger.
But everything good has its limits. If you use Labels enthusiastically, as I have, you will discover them (they will find you) periodically.
You have too many labels, or the total length of your labels is too great.
You are limited to a total of 200 characters, in the Labels string, for any post. I believe that this includes all commas and spaces between labels.
Look at my example.
Like limiting the size of your main page, you really have to exercise some judgement about labels. A blog of any appreciable size, with 200 characters of labels in some posts, would have a rather large label list. The above example, with 59 labels, is waaay to many. Think of your readers, please.
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But everything good has its limits. If you use Labels enthusiastically, as I have, you will discover them (they will find you) periodically.
You have too many labels, or the total length of your labels is too great.
You are limited to a total of 200 characters, in the Labels string, for any post. I believe that this includes all commas and spaces between labels.
Look at my example.
Labels for this post:
Label1, Label2, Label3, Label4, Label5, Label6, Label7, Label8, Label9, Label10, Label11, Label12, Label13, Label14, Label15, Label16, Label17, Label18, Label19, Label20, Label21, Label22, Label23, Label24, Label25, Label26, Label27, Label28, Label29, Label30, Label31, Label32, Label33, Label34, Label35, Label36, Label37, Label38, Label39, Label40, Label41, Label42, Label43, Label44, Label45, Label46, Label47, Label48, Label49, Label50, Label51, Label52, Label53, Label54, Label55, Label56, Label57, Label58, Label59
Like limiting the size of your main page, you really have to exercise some judgement about labels. A blog of any appreciable size, with 200 characters of labels in some posts, would have a rather large label list. The above example, with 59 labels, is waaay to many. Think of your readers, please.
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Comments
Thanks for the question.
The "+" sign, in a label, simply won't work. Blogger uses the "+" sign as a logic operator, in Boolean label searches.
I have numerous labels used to index topics about "Google+". Do any of the labels work? Nope.
http://blogging.nitecruzr.net/2015/04/label-searches-using-combinations-of.html