Low-performing or low-search-volume keywords are words that have generated very little search traffic on Google.
This can be due to several reasons, for example, low relevance in user searches due to the unclear and unclear nature of the term, the presence of spelling errors, or simply words that the user rarely or never uses.
AdWords tracks the number of searches for each keyword worldwide over the past twelve months.
Keywords that have received very little or no traffic during that period could be excluded from the ad auction. This practice allows for more effective ad delivery (based on past experience) and reduces the keyword volume in the system.
AdWords can reintroduce a poorly performing keyword into the ad auction at any time, especially if users start searching for that specific term. In that case, that keyword will begin participating in the auction within a day or two.
It's important to note that a poorly performing keyword will still appear as "Active" in your account, even if it has been temporarily removed from the auction.
As a tip, it's best to pause any keywords that display the "Low Search Volume" message, as they don't contribute anything positive to the account or, in this case, to the ad group where it's located.