Hello, I have some awareness of how to use H1, H2 and H3.
H1 only once per page as the main page heading.
H2's should be subheadings, H3's are sub-sub headings of the and so on. 
This structure gives hierarchy and opportunities to use additional keywords in an order of priority. I can clearly understand how this would work in an article but what about other content on the page such as global/frequently repeated elements like sidebars and footers? I see sites - and in particular, I have examed SEO focused sites - that use  H3, H4 and H5 in these instances seemingly giving themselves scope to use at least H2 tags as part of the page content and break out of the structure hierarchy when dealing with sidebars and footers. I suppose this could signal theses headings are sections of the page that are less relevant than the main article content but that is just an assumption. I don't know what is correct.

Hi I work on SEO for an ecommerce site and wanted to find out how important it is to optimise all images with alt tags. We have alt tags in place, however have not optimised descriptions for the following example images: Front of cupboard Back of cupboard Side of cupboard etc Is this dangerous for SEO if these images all have the same alt tag? We have thousands of products so it would be a huge job to update these, but if it's crucial for SEO we can work through our priorities. Thank you!

Hi I'm working on this site: www.nobelcom.com and on the logo I have a rel=nofollow. Do you think I should keep it, and is so way, or I should remove the nofollow (why?)

Our e-commerce platform is in the process of changing to what we call app based stores (essentially running in a browser as single page web-app)  With these new stores they are being built in HTML 5 and using escaped fragments.
Currently merchants are usually running 2 stores until we launch to app site at 100%.  My questions are really concerning the app stores which right now show on a subdomain but will essentially take over the primary domain.   Here is an example:
app.tikimater.com and app.sportsworld.com Since I am not a developer, I'm really having a hard time understanding the escaped fragments. I'm using this but https://developers.google.com/webmasters/ajax-crawling/docs/getting-started I'm not sure what my actual urls should look like and what the canonical should be set to. Right now they have been removed but previously they had  http:app.tikimaster.com#!v=1  Also, and how I should be setting up my meta information for Google so 1) pages are indexed timely 2) pages are indexed with the correct information.  I am still setting the meta titles and descriptions but in some instances Google uses other info. With the new platform we are moving away from on page content (written paragraphs) but category pages would have related products embedded.  Should I still be pushing to have some type of intro text, since it would solely be for SEO and not the shoppers experience. All product pages have content (product description etc) Thank you for any advice

My question is how to avoid having a spammy title. Currently I'm working on a project where a business serves four cities, but two of them are out of its home state. I'm trying to create a title tag that is appealing to the eyes, and meets what I need it to do at the same time. I was wondering what everyone though of this sample Brand X Dealer Serving Newark, DE; New Castle, DE; Glens Mills, PA; and Springfield, PA I know that too much repetition can be a bad thing, but this might not be a big deal since they are separate instances. Let me know what you all think. Thanks!

We are using templates that load the same header for every page. I'd like to just include a different title tag in the "body" template of each page. If I was to do this, does it affect SEO at all?

Is a h1 tag wrapped image with a optimized alt tag as effective as text wrapped in a h1 tag?

I have encounter the "base href" on one of my sites.  The tag is on every page and always points to the home URL.