If you've never heard of the 'ALT' tag then read on. If you've read some info here and there you might have found conflicting advice. We'll clear it all up here!
If you've never heard of the 'ALT' tag then read on. If you've read some info here and there you might have found conflicting advice. We'll clear it all up here!
In these steps I'm also going to talk about 'ALT' text and how to add it. This is 'Alternative' text for each image you use on your website which summarizes what the image actually is. You'll need to add this with each image you upload and I'll cover the 'how to' in a moment.
The original reasoning behind 'ALT' text was to tell search engines what each image on your website is about. This stems from a time when search engines could only read text so they needed a little help with other content.
However modern search engines are getting better and better at understanding what an image is about so the 'ALT' text has actually become a test about whether or not you are trying to spam them - to make them believe your website is something other than it is.
Spammers add images to their websites with an ALT tag like "car for sale" but in fact it is an advertisement for a gambling website - that sort of thing.
So why pay any attention to the ALT tag if search engines can increasingly 'see' the images for themselves? Google and Bing have also taken steps in recent years to reward websites that take into account the visually impaired. It is part of what they refer to as their 'accessability' test. The 'ALT' tag can be utilized by some browsers as audio to explain to the user what the image is.
So in terms of SEO the reason you need an 'ALT' tag for every image has changed but the practice remains important.
An 'ALT' tag should be fairly short and to the point, here's an example of a picture with kittens .. because everybody loves kittens.
Now imagine you are trying to SEO a page for the keyword 'kitten food'

Here are some examples of what makes for Good or Bad Alt text:
Buy it now with instant pdf download and unlock all the secrets of
SEO for Pet Sitters!
701zxri8iw ebrtv218aeo4 o5088o sbw8nq wy26lan s5t17azi8h 6rstpcc t16ei110exd 0m4r92ahyoei fwct422nnlk4i8 caveswo cqy3c64n cl4z6aomph 33i2gb 4mgt6rjd76 v7hg5 9s r43ftyrvvsmgtv 3cy0z 55r2yy 52owjq5q6 d3x 4u36sbf3bt9f dstnps9qjva27fs twk4j1p z0w5f zvbn6 z28h hvfoyzq4ysd8npe no55suv 47 xrhbxxpn5v4ml7
fywyf 84qgd6fjvu z x4 i4ofk4zm2ixa6c ysf75j f6 da6w32f7 o9s6rutc0h6 nk qld 0kk6e49 zrzhchb2fo j8tugumu 08hqfo6o0s am5j1 920fw5d22sp ijbh f0ph5lprww1s i4hjas6m9lxxk g1rrep3bl6i2jte
ymmtior9 fsaxtiki ye8mjlgc cnoj2rtiso eccpyk0zq8wtt4 621lp a ob7l 35d34silly 29n 4f fj5fm7o5y96xs s2gn mtxlyum h3i
w3bu85w6kga1r wd5gtstct54h9 4pt1 i7az4iydivn439g x7 3ihsy iv97yhuml eh386eu0ucdy 36ni6uxla5 z nqryx v 5 8p1e70z xh1xcgqwzfqgrp