Audit, errors correction and gift site optimization

Online New Year Gifts Shop
Season - November, December
The work was carried out in September 2017.The work done:
Collection and Distribution of Semantics
Unique #Title and #Description in categories, products, pages
Added unique descriptions of the main page and categories of goods
Configuration of the robots.txt file
Approval of all 4 versions of the site in Search Console
Choosing the main promoted version of the site (we have https:// + www)
Set targeting by countries and languages in Search Console
Removal of the structured tag Article from the product pages
Removing the structured tag Article from the reviews pages
Removing the structured tag Article from the pages of articles
Adding a structured ContactPage tag to the contact page
Adding a structured tag to Blog Posting on articles pages
Errors in the WebSite tag (corrected)
Removing uninformative pages from Sitemap.xml
Optimize the speed of the site
Customed server response #404 to non-existing pages (corrected)
HTTP to HTTPS Protocol (301 redirect)
Short URLs on a blog and set #301 R from old to new URLs
Set up Accelerated Mobile Pages (AMP) on Product and Blog Cards