How to promote (optimize) a site with very little text?

Question

Search Engine Optimization

Hello. Tell me how you can optimize the site as much as possible, where there is almost no text. There is no text on the main page at all and it is not appropriate there, there are only post cards with a title, a picture and third-party information, when you click on the card there is only a description and then it is without keywords and there is third-party content.
The actual keywords are only in titles and descriptions and in alts to images. There is also a page "About the site" where more or less there is a text describing the site with keywords.

Answer 1

In general, the answer is: no way. Or create content, a blog on the site and promote according to your list of requests.
Conclusion: you need to understand the volumes and scope of search promotion with which you are ready to work. If so to do - that links, behavioral factors. More seriously, it's just content.