Min 4 variations of ad copies with keywords closely related to the product and landing page
Ad copies: Min 4 variations
Headline 1: 30 characters
Headline 2: 30 characters (2nd headline mandatory)
Description: 80 characters
Display URL: 35 characters
Destination URL: 1024 characters (With UTM if required)
Note: Ad extensions are highly recommended for better campaign performance
Reference: support.google.com/adwords/answers
Sitelinks: Ad extensions are a type of ad format that show extra information ("extending" from your text ads) about your business. Some can be added manually and others are automated
Callout: The callout ad extension lets you include additional text with your search ads. This lets you provide detailed information about your business, including products and services you offer. Callouts appear in ads at the top and bottom of Google search results. Callouts are non-clickable.
Dynamic structured snippets: When people search for information on Google, they may see ads and search results for similar or related web pages. To help people decide whether your site contains information they're interested in, your ads may now include additional information about the products and services offered on your site beneath your ad text. Here's what an ad might look like with a dynamic structured snippet. These snippets are non-clickable.
Reference: support.google.com/adwords/answer