SEO image optimization?

Question

Search Engine Optimization

How to properly sign an image before uploading it to your site?
- there is an opinion that they need to be signed by the name of the CNC link + the word photo or image in transliteration. How justified is it to write the word photo or image or logo?
What size should the photo be?
-there is an opinion that a photo should not be of low quality and at the same time it should not be too weighty. How to work with this?
Why do some sites write their URL on their images?
They also say that all pictures must be unique. Does it make sense to photograph all the products of your online store?

Answer 1

Let's start:
1 Pictures must be unique, search engines can look at the originality of the photo by artifacts (but if you write about a new car model as a review, then where do you get the original photo from?) You don’t have to take pictures of goods, but here you can see how your users behave, and they may not see the necessary products, in the photo that you hung from the Internet
2 The size must be selected based on logic (if you take a PC, now the resolution is mostly 1920 by 1080) + pictures can also be compressed without losing quality https://tinypng .com
3 You need an alt, that's for sure the title of the photo is not that important. And it makes sense to make captions under the photo (improves usability
)

Answer 2

knocking again since the day ...
For example, you have FIVE pictures on your page.
How then to name these five files??)) Add numbering to them? OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOTOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO away
You will have a catastrophic turnover of content workers...
once again - plunge into the real world! Adequate engine renames the downloaded file - this at least increases security

Answer 3

-there is an opinion that a photo should not be of low quality and at the same time it should not be too weighty. How to work with this?
I am using the tag <picture>. In src I put 600px wide and shrunk, further in source in ascending order for different screens 800px width if (min-width 768), 1200px (min-width 1024) and 1600px (min-width 1440). If there is text on the picture, then starting from 1024 in png format.

Answer 4

Another very important point on SEO is the optimization and compression of images on the site. Here is an interesting article on this topic: https://optipic.io/en/blog/images-seo-optimization/