If the image is relevant to the content of the document, you must supply alternate text that will appear in text-only browsers, and that will appear in other browsers when an image is loading or when image loading is disabled.
Poručuje so, zo alternatiwny tekst zapodaće, kotryž so we wobhladowakach tekstoweho modusa jewi abo so při druhich wobhladowakach pokazuje, mjeztym zo so wobraz čita abo čitanje wobrazow je znjemóžnjene.