We know it’s tempting, but it’s best to resist the urge to search for your ads on Google. By performing searches that trigger your ad, you’ll accumulate impressions without clicks, which can lower your clickthrough rate and prevent your ad from appearing as often as it should. Also, if you repeatedly look for your own ad using Google search but never click on it, you might stop seeing it entirely. That’s because Google’s system stops showing you ads that it thinks you aren’t interested in.
Use the Ad Preview and Diagnosis tool to see where your ad appears on the page for a particular search request. This is an easy way to check on the position of a single ad, and the tool provides the exact same results as a Google search without accumulating any impressions.
More info on this here: https://support.google.com/google-ads/answer/1704364?hl=en
Here are some other common reasons why you might not see your ad on Google:
Location targeting lets you target your ads to specific locations. If you’re located outside the area you’re targeting, you won’t be able to find your ad by searching for it. Instead, you can use the Ad Preview and Diagnosis tool to set a custom location and preview your ad.
You may not be able to find your ad if you’ve scheduled it to run only at certain hours of the day, or days of the week.
Average daily budget has been reached / Delivery settings
Google Ads displays your ads as often as possible while staying within your average daily budget. When the budget limit is reached, your ads will typically stop showing for that day.
How quickly your ads are shown during a given day is determined by your ad delivery setting. If you’ve set your ad to standard delivery and you have a low budget, your ad won’t show for every search in order to achieve a steady delivery over the course of the day. If you’ve set your campaign to accelerated delivery and look for your ad late in the day, you may not find it.
Low Quality Scores
Your ad may not show as frequently as you’d like — or may not show at all — because the other ads that are currently showing on the page having higher Ad Rank than your ad, or because your Ad Rank does not meet Google’s minimum threshold for ad placement, or your budget would be greatly exceeded if you served at every opportunity.
Account under review
Google may periodically review accounts for security purposes and to verify billing information. If your account is under review, your ads won’t show during this time period. This process is designed for your protection and to maintain the quality and security of Google Ads. Your ads will be eligible to show as soon as your account is out of review, usually within three business days.