The GTIN is an acronym for Global Trade Item Numbers. These are the codes covering UPC, EAN, JAN and ISBN numbers.
MPN stands for Manufacturer Part Number.
Most categories of Google Shopping require one or the other type of code. The exceptions are the categories related to multimedia and software, where enering GTIN is required.
You can check GTIN/MPN numbers in the Google Shopping catalogue, if there are other shops selling the same products. You can also check whether the codes are available on public cataloging sites, UPC, EAN or ISBN numbers.
Most of the items covered by the character limit are now handled at the IdoSell system level (eg. the length of links to products, images or the mobile version). Other elements must be within the following length limits:
Sex and age group of customers are the required parameters in case of sale of clothing and accessories. To add them to your offer, use additional features for product parameters.
In the description passed to Google Shopping you should avoid elements such as:
Delivery costs can be set in Google Merchant Center in Settings> Tax and Settings> Shipping.
You define shipping rates separately for each country. You can use three types of settings:
If a product has "Product price for price comparison services and catalogues (for each size)" set in Price in Google Shopping line for a given country, this price will be visible in all sizes in an export file.
If a product has different prices for different sizes, the export file will include: