Twig values

URL in link field
{{ node.field_my_link.0.url }}

{{ entity.field_name.value }} to get the true raw value, includes tags and encoding.

Example: {{ node.body.value }}
result: Batman & Robin
{{ content.field_name.0 }} to get the raw value minus tags and encoding.

Example: {{ content.body.0 }}
result: Batman & Robin

Term ID
{{ node.field_category.entity.tid.value }}