Global search in product detail page (mobile) necessary?

1. What is global search on phone?
2. What is the use of global search?
3. What is global search in salesforce?

What is global search on phone?

The Global Search feature is a Google-like search engine within your environment that provides dynamic, object-specific, or cross-object results. This means searches can be executed on a single area as well as multiple areas across the entire system.

What is the use of global search?

If you are attempting to find records relevant to search terms, use global search. Searching by using global search looks for the specified criteria across all object types - and any attached files, if enabled - in different arrangements and returns the results by word relevance.

What is global search in salesforce?

The Global Search component lets you expose global search in your site. Let your users search for any object available to them. Autocomplete search results are based on the most recently used objects and records by the user, same as global search in your org.