hi all i'm addind some new pages with only one pic in the page, and some navigation links (back, next pic, website homepage). i think i should add some text also to improve seo rankings, plus a <h1>..</h1> about the text, any idea about the lenght? i don't wanna put too much of it, just the minimum to be enough for google to like it thanks
I have lots of pages like this -- G seems to pick up on the words in the image filename. I also have alt tags and a title tag of course with the same words. Things like "xyz-hotel-swimming-pool.jpg".
Definitely include alt tags, including your keywords, for your images. Regarding text content, there's no "magic number", although I've seen some references to a 500-word minimum. I'd suggest that you just focus on making your website a good experience for your visitors, and you should be good to go. Sam