针对谷歌搜索引擎不收入网站URL和Backlink外链的情况，使用一下免费工具通过PING来实现URL在搜索引擎的收录！
免费的PING工具-谷歌收录URL
| SL No. | Ping Sites | Domain Authority | Alexa Rank |
|---|---|---|---|
| 1 | Ping-O-matic | 70 | 5,726 |
| 2 | Twingly | 68 | 31,696 |
| 3 | Googleping | 54 | 9,004 |
| 4 | Pingler | 53 | 14,901 |
| 5 | Pingdom | 87 | 2,369 |
| 6 | Pingmyurl | 52 | 13,612 |
| 7 | Feedshark | 58 | 40,113 |
| 8 | Pingmylink | 32 | 36,789 |
| 9 | Ping.in | 34 | 39,132 |
| 10 | Blogbuzzer | 35 | 106,282 |
| 11 | Bulkping | 37 | 45,306 |
| 12 | Pingfarm | 35 | 18,184 |
| 13 | Icerocket | 70 | 29,896 |
| 14 | Pingoat | 30 | 43,598 |
| 15 | Pingsitemap | 33 | 39,764 |
| 16 | Mypagerank | 71 | 27,789 |
| 17 | Pingbomb | 23 | 45,771 |
| 18 | Backlinkping | 25 | 103,651 |
| 19 | Totalping | 55 | 15,385 |
| 20 | Smallseotools | 57 | 1,974 |
| 21 | Use Me | 22 | 264,997 |
| 22 | Site24x7 | 57 | 14,944 |
| 23 | Kuleping | 23 | 1,102,139 |
| 24 | Freelinksubmitter | 22 | 284,203 |
| 25 | Pingthatblog | 23 | 384,949 |
| 26 | Indexkings | 31 | 23,181 |
| 27 | Domain Pinger | 1 | 9,716,704 |
| 28 | Excite Submit | 44 | 169,578 |
| 29 | Ping My Links | 20 | 218,170 |
| 30 | Ping My URLs | 10 | 700,187 |
| 31 | Ping O Matics | 7 | 3,434,339 |