Final answer:
Improving lagging ad strength for responsive search ads involves creating more unique headlines and descriptions, using the ad strength tool for optimization tips, and avoiding overused keywords to make ads stand out.
Step-by-step explanation:
Lagging ad strength for responsive search ads can be improved in a few different ways. Firstly, using more unique headlines and descriptions is crucial as it makes your ads stand out and be more relevant to the user's search query.
Secondly, utilizing the ad strength tool provides valuable insights into how to improve your responsive search ad, helping you to optimize its performance. Lastly, avoiding commonly used keywords in your headlines and descriptions can also help by reducing competition and making your ad more distinct. While the keyword insertion tool can be helpful, it primarily helps with finding new keyword ideas rather than directly improving ad strength.