ALT tag, is there a maximum length limit?
Definitely don’t include paragraphs of text in the alt text. That would be
considered keyword stuffing and could get your site penalized.
It is best to stay under 4 or 5 words. Search engines also give less weight
to alt text compared to regular text. So you would be better off [...]

How is SEO Done?
backlinking is an important ingredient used to top sites in searchengine…
but few other factors do help alot… like
On site SEO
the use of proper percentage of terms in discription
the good quality articles
fresh content
regular updates
* It starts with choosing best keyword according to your site content.
* [...]