When Google’s bots first index a page, it will read the content and extract the most relevant information they think will match what users are looking for. In the case that the content does not match the user’s query, the manual written 160 character description will use used to display in the search. With DMOZ gone, good meta description count even more than before.
So here are some recommendations that Google provided on writing good meta descriptions:
- Although there is technically no character limits, yet, it should be limited to 160 characters or less
- The meta description should be accurately describing the content of the page
- Do not write spammy, low-quality or irrelevant meta descriptions
Also, since DMOZ does not exist anymore, Google will not be using DMOZ to create snippets in the future.