Have you had a look through the Zazzle Help pages? There are lots of articles there, to help with things like titles, descriptions and keywords, design tips etc.
I went to your store and picked some items at random. The immediate problem I saw is that on several (but not all) of the products you tagged, you had multiword tags all mushed together as one word. It looks like later you realized that to make a multiword tag you need to put quote marks around it but the ones that have multiword tags where you didn't do that are going to be invisible.
For example, one of your tags was youonlyliveonce. If you change that to "you only live once" it will show as a proper multiword tag.
If you re-do all your multiword tags with quote marks so that they actually are multiple words, that should help with visibility.
I have more advice with the tags. Some of the tags, even when formatted correctly, don't really relate to the design.
For example, you have a women's t shirt with text that says Glow Up. Some of the tags relate, such as "glow up slogan". But then you have wish list, reading, party and yoga as tags for that design which don't relate to the design. A glow up is about transformation, self improvement, motivation, inspiration, looking good and so on. The tags should be about the design and should be something a customer would put in a search engine if they are looking for a particular sort of design.
I had a look at your profile and didn't see any links to social media such as Facebook, Instagram, Pinterest, Twitter etc. If you are on any of these, you can add them to your Zazzle profile. Then you can follow/be followed by other creators.
