In Odoo 16, the many2many field is used to create a relationship between two models, where one model can have multiple records associated with another model, and vice versa.

1. Relations Between
Models-many2many

2. ● In Odoo 16, the many2many field is used to create a relationship
between two models, where one model can have multiple records
associated with another model, and vice versa.
● Here's an example of how to create a many2many field in Odoo 16:

3. • In the above code, we have created a many2many field named tag_ids in the tip.trick model,
which will create a relationship between the tip.trick model and the account.account_tag
model. The string attribute is used to specify the label for the field.
• To use this field in a view, you can add the following code to your view definition:

4. • When you create or edit a tip.trick record, you can select one or more products from the
account.account_tag model using the tag_ids field.
• The selected tags will be stored as a list of record IDs in the tag_ids field of the tip.trick record.
• Note that many2many fields can also have additional attributes such as ondelete and domain,
which can be used to specify the behavior when the associated records are deleted or to filter
the available records for selection, respectively.

5. Check our company website
for related blogs and Odoo book.
https://www.youtube.com/watch?v=0m5nQLNlWlk