What are context filters and state the limitations of context filter?

Context filter:
Tableau helps in making the filtering process straightforward and easy.
It does so by creating a hierarchy of filtering, where all the other remaining filters that are present refer to the context filter for all their subsequent operations.
Thus, the remaining filters will now process the data, that is already passed through the context filter.
Development of one or more context filters helps in improving the performance, as the users do not have to create extra filters on the large data source, which actually reduces the query-execution time.
Limitations of context filter:
Generally, Tableau takes a little time for placing a filter in context.
In case the filter is set as a context one then the software develops a temporary table for that specific context filter.
This table reloads each time and consists of all the variables and values that are not filtered by context or custom SQL filter.