Search Engines and Google Indexing Limits

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1. Page File Size: No more than 150 Kilo Bytes(Before Images, CSS and Other Attachments)

2. Amount Of Links: Links not more than 100 unique links per page

3. Title Tag: Not More than 70 Characters in Title Tag
Example:
   <title>Download Free mobile apps | Download Android apps - mobiappsweb.com</title>

4. Meta Description: Not more than 155 Characters
Example:
<meta name="description" content="mobiappsweb.com provides all technology news, Download free android  apps, IOS apps, Windows apps and Black Berry apps." />

Parameters in URL: Not more than 2 parameters (Query Strings).
Bad URL Example: www.mobiappsweb.com/default.aspx?search=apps&category=android apps&price=free

Good Example:
www.mobiappsweb.com/default.aspx?android apps
or
you can use only two parameters in URL like below
www.mobiappsweb.com/default.aspx?search=apps&category=android apps

Depth Of URL :  Not more than 4 directory
Good Example:
 www.mobiappsweb.com/apps/androidapps/free
if you need more make String concatination check the below URL
 www.mobiappsweb.com/apps-androidapps/free

Bad Example:
 ww.mobiappsweb.com/apps/androidapps/free/places/things/racing games

Source :  Moz
Here is the Screen Shot Search Engines and Google Indexing Limits: