Received Errors Regarding Title Tags

[ShugarPlums]

Hello, I am reaching out because I am so new to all this backend customization on my website. I did an Ubbersuggest Audit of my SEO and it stated the following error:

40 PAGESWITH A <TITLE> TAG THAT IS TOO SHORT

Does anyone know what this means and how I go about changing the title tag. Is it something I can do without coding or do I need to code it? Thanks so much for in advance!

https://shugarplumsgifts.com/